Box 50Options for date of publication
It is not NLM policy, but the date of publication may follow the author
names (or type of medium if there are no authors) in the list of
references when the name-year system of in-text references is used.
Use only the year of publication (omitting months and days)
or of copyright if there is no publication date
Keep the hyphen following the date when the database is
open
Include both the beginning and ending years if a database is
closed
Keep any square brackets surrounding a date
Use [date unknown] if no date can be determined
Place the year(s) or [date unknown] after the last named
author (or after the type of medium if there is no
author)
End date information with a period
End the publisher name with a period
Leave any date of update/revision in its usual location
NLM citation:
Houston R, Conrad P, Boyce W, Hayes R.
ParasitoLog: an interactive database of veterinary
parasites [CD-ROM]. Davis (CA): University of
California, School of Veterinary Medicine; 1997. 1
CD-ROM: color, 4 3/4 in.
Current opinion in obstetrics & gynecology,
with evaluated MEDLINE [CD-ROM]. Cambridge (MA):
Electronic Press, Inc. 1995 Nov
- . CD-ROMs: 4 3/4 in.
Plunkett's health care industry almanac [CD-ROM].
Houston (TX): Plunkett Research, Ltd. 1999-2000
- . CD-ROMs: 4 3/4 in.
Clydesdale FM, editor. Food additives:
toxicology, regulation, and properties [CD-ROM].
Boca Raton (FL): CRC Press; c1997. 1 CD-ROM:
sound, color, 4 3/4 in.
IBEDOCS: IBE Bibliographic Catalogue [CD-ROM].
Geneva: UNESCO, International Bureau of Education.
[1971] - . CD-ROMs: 4 3/4 in.
Compact library: AIDS [CD-ROM + disk].
Version 1.55a. Boston: Massachusetts Medical
Society, Medical Publishing Group. 1980 - 1990
[updated 1990 Oct]. CD-ROMs: color, 4 3/4 in.;
Computer disks: color, 5 1/2 in.
Name-year system citation:
Houston R, Conrad P, Boyce W, Hayes R. 1997.
ParasitoLog: an interactive database of veterinary
parasites [CD-ROM]. Davis (CA): University of
California, School of Veterinary Medicine. 1
CD-ROM: color, 4 3/4 in.
Current opinion in obstetrics & gynecology,
with evaluated MEDLINE [CD-ROM]. 1995
- . Cambridge (MA): Electronic
Press, Inc. CD-ROMs: 4 3/4 in.
Plunkett's health care industry almanac [CD-ROM].
1999-2000 - . Houston (TX):
Plunkett Research, Ltd. CD-ROMs: 4 3/4 in.
Clydesdale FM, editor. c1997. Food additives:
toxicology, regulation, and properties [CD-ROM].
Boca Raton (FL): CRC Press. 1 CD-ROM: sound,
color, 4 3/4 in.
IBEDOCS: IBE Bibliographic Catalogue [CD-ROM].
[1971] - . Geneva: UNESCO,
International Bureau of Education. CD-ROMs: 4 3/4
in.
Compact library: AIDS [CD-ROM + disk]. 1980
- 1990. Version 1.55a. Boston: Massachusetts
Medical Society, Medical Publishing Group.
[updated 1990 Oct]. CD-ROMs: color, 4 3/4 in.;
Computer disks: color, 5 1/2 in.