Box 22Titles ending in punctuation other than a period

  • Most titles end in a period. Place the closing period after the content type and type of medium.
    • Rat Atlas [database on the Internet]. Los Angeles: University of California, Los Angeles, Laboratory of Neuro Imaging. c2007 -   [cited 2007 Feb 1]. Available from:
  • If a title ends in another form of punctuation, keep that punctuation. Place the content type and type of medium in square brackets after the title and end title information with a period.
    • Is Your Doctor Certified? [database on the Internet]. Evanston (IL): American Board of Medical Specialties. c2006 -   [updated 2006 Mar 17; cited 2007 Jan 31]. Available from:

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-.

NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.