Box 111No date of publication or copyright can be found

  • If neither a date of publication nor a date of copyright can be found, but a date can be estimated because of material in the record, insert a question mark after the estimated date and place date information in square brackets
    • Bagley TR. Genomic studies of digestive cancers. [2004?] [cited 2007 Mar 9]. In:
  • If neither a date of publication nor a date of copyright can be found nor can the date be estimated, use the date of update/revision and/or the date cited
    • Collins YE, Perkins JT. Current status of non-Hodgkins lymphoma therapy. [modified 2006 Jan 1; cited 2007 Mar 9]. In:
    • Stern AH, Petersen PF. Global strategy for the prevention of chronic obstructive pulmonary disease. [cited 2006 Nov 3]. In:

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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