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Four parameters

• required LCCN, which is pagename at lccn.loc.gov (completes the URL)
• optional display name; default is pagename
• optional number of LC catalog(ue) records accessed via the target page
• optional 'ue' for the spelling catalogue; default is catalog

Illustration

* {{LCAuth|n82230554|Jez Alborough|41|ue}}

displays as

• Jez Alborough at Library of Congress Authorities, with 41 catalogue records

and links to http://lccn.loc.gov/n82230554, a reader-friendly version of Alborough's LC Name Authority File

* {{LCAuth|n79104607|Molly Bang|42|}}

displays as

• Molly Bang at Library of Congress Authorities, with 42 catalog records

and links to http://lccn.loc.gov/n79104607, a reader-friendly version of Bang's LC Name Authority File

* {{LCAuth|n82230554|||}}

displays as

• LCAuth/doc at Library of Congress Authorities, with {{{3}}} catalog{{{4}}} records

and links to http://lccn.loc.gov/n82230554, a reader-friendly version of Alborough's LC Name Authority File

* {{LCAuth|n82230554 | | | }}

displays as

• LCAuth/doc at Library of Congress Authorities, with {{{3}}} catalog{{{4}}} records

and links to http://lccn.loc.gov/n82230554, a reader-friendly version of Alborough's LC Name Authority File