Box 52No date of publication, but a date of copyright

  • A copyright date is identified by the symbol ©, the letter "c", or the word copyright preceding the date. If no date(s) of publication can be found, but the publication contains a date of copyright, use the date of copyright preceded by the letter "c"; for example c2005.
    • Biozon [Internet]. Release 2.4. Ithaca (NY): Cornell University. c2005 -   [updated 2006 Aug; cited 2007 Feb 1]. Available from: http://www.biozon.org/.
    • ProQolid: Patient-Reported Outcome and Quality of Life Instruments Database [Internet]. Lyon (France): Mapi Research Institute. c2001 -   [updated 2005 Nov; cited 2007 Jan 31]. Available from: http://www.proqolid.org/.
    • DocFinder [Internet]. [place unknown]: Administrators in Medicine. c1997 - c2005 [cited 2007 Feb 2]. Available from: http://www.docboard.org/docfinder.html

From: Chapter 24, Databases/Retrieval Systems/Datasets on the Internet

Cover of Citing Medicine
Citing Medicine: The NLM Style Guide for Authors, Editors, and Publishers [Internet]. 2nd edition.
Patrias K, author; Wendling D, editor.
Bethesda (MD): National Library of Medicine (US); 2007-.
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