Box 53No 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 book or on accompanying material, insert a question mark after the estimated date and place date information in square brackets
    • Evaluation of health literacy work among libraries and community organizations in the New York City area: report highlights [Internet]. New York: Americans for Libraries Council; [2002?] [cited 2006 Nov 1]. 4 p. Available from:
  • 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
    • Bibliography of numeracy resources 1980-2005 [Internet]. Ottawa (OT): Government of Canada, Human Resources and Social Development; [modified 2006 Jan 1; cited 2006 Nov 1]. Available from:
    • Global strategy for the diagnosis, management, and prevention of chronic obstructive pulmonary disease [Internet]. Columbia (MD): Global Initiative for Chronic Obstructive Lung Disease; [updated 2005; cited 2006 Nov 3]. 115 p. Available from:
    • Toolkit of instruments to measure end of life [Internet]. Washington: George Washington University Medical Center, Center to Improve Care of the Dying; [cited 2006 Nov 1]. Available from:

From: Chapter 22, Books and Other Individual Titles 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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