Template:Harvard citations
This template is used on approximately 1,500 pages and changes may be widely noticed. Test changes in the template's /sandbox or /testcases subpages, or in your own user subpage. Consider discussing changes on the talk page before implementing them. 
Purpose
The "Harvard citations" template is for producing more complicated Harvard citations, when one wishes to link several publications by the same author, or add a link to the author's name. For most simple Harvard citations the templates {{harv}}, {{harvtxt}}, and {{harvnb}} are easier to use.
The template name "Harvard citations" can be abbreviated as "harvs".
Note that the use (or even nonuse) of these templates is an element of citation "style", and adding or removing them in articles with an established style should be consistent with that style. See WP:CITEVAR.
Also note that inline use of these templates, i.e. use of {{harvs}} without <ref>...</ref>
tags around it, was deprecated in September 2020.
Parameters (all optional)
Most of the parameters, in particular those for authors, editors, and year, should be the same as for the corresponding citation template. (If these are missing the template will try to guess them by looking for other parameters such as "date", "author" and so on.) In fact one can produce this template just by changing the name "citation" in the corresponding citation template to "harvard citations" and keeping all parameters the same.
{{Harvard citations  last=  first=  authorlink=  last2=  first2=  author2link=  year=  year2=  editorlast=  editorfirst=  editorlink=  editor2last=  editor2first=  editor2link=  txt=  nb=  otherpage=  ref=  loc1= }}. 

Examples
An example with authorlinks:
 A reference is {{harvard citations first=F. J. last=Murray author1link=F. J. Murray first2=J. last2=von Neumann author2link=John von Neumann year=1936 loc1=p. 118 }}.
A reference is (F. J. Murray & J. von Neumann 1936, p. 118).
An example with txt
 The theory was developed by {{harvard citations txt first=F. J. last=Murray author1link=F. J. Murray first2=J. last2=von Neumann year=1936 year2=1937 year3=1943 }}.
The theory was developed by F. J. Murray and J. von Neumann (1936, 1937, 1943).
An example using nb to list 2 sets of authors, using citationpage to link to the von Neumann algebra page:
 The theory was developed in a series of papers ({{harvard citations nb=yes citationpage=von Neumann algebra first=F. J. last=Murray author1link=F. J. Murray first2=J. last2=von Neumann year=1936 year2=1937 year3=1943 }}, {{harvard citations nb citationpage=von Neumann algebra first=J. last=von Neumann year1=1938 year2=1940 year3=1943 year4=1949 }}).
The theory was developed in a series of papers (F. J. Murray & J. von Neumann 1936, 1937, 1943, J. von Neumann 1938, 1940, 1943, 1949).
More examples (mainly for debugging template)
{{Harvard citations last1=Beilinson last2=Bernstein last3=Deligne year=1982 txt=yes }}
Beilinson, Bernstein, and Deligne (1982)
{{Harvard citations last1=Beilinson last2=Bernstein last3=Deligne year=1982 txt }}
Beilinson, Bernstein, and Deligne (1982)
{{Harvard citations last1=Beilinson last2=Bernstein last3=Deligne year=1982 }}
(Beilinson, Bernstein & Deligne 1982)
Sample references
 Murray, Francis J.; von Neumann, John (1936), "On rings of operators", Annals of Mathematics (2), 37: 116–229,
 Murray, Francis J.; von Neumann, John (1937), "On rings of operators II", Transactions of the American Mathematical Society, 41: 208–248,
 Murray, Francis J.; von Neumann, John (1943), "On rings of operators IV", Annals of Mathematics (2), 44: 716–808.
See also
 Use
{{Citation}}
to format the citations in the References section.