A journal article must have a journal name (%J) and a volume number (%V). It usually also has one or more authors (%A), a title (%T), page numbers (%P), and a date of publication (%D), and sometimes an issue number (%N). It may have a publisher (%I) or be a translation. In the this case, certain lower case fields are used. It should have a URL for an electronic version of the article. Two examples:
%A Tammo tom~Dieck %T Bordism of $G$-manifolds and integrality theorems %J |TOPOL| %P 345-358 %V 9 %D 1970 %K dieck %U http://too.old.tobeonline.org/bordism.pdf %A V. I. Arnol'd %T Singularities of smooth mappings %J |USPMN1| %V 23 %P 3-44 %D 1968 %K arnold %j |RUSMS| %v 23 %d 1968 %p 1-43
The AMS memoirs are cited like journals, except that both the volume number and the number of the memoir are needed. Use %V to specify the volume number and %N to specify the memoir number:
%A Peter B. Shalen %A W. Jaco %T Seifert fibered spaces in 3-manifolds %J Memoirs Amer. Math. Soc. %V 21 %N 220 %D 1979 %P viii $+$ 192 pp
A conference presentation can be either an unpublished report or an article in a proceedings which has no editor and is identified by the conference. In this case the name of the conference is put in the journal field (%J). There is no volume (%V) field. There are likely also one or more authors (%A), a title (%T), a date (%D) and a city (%C), and in a proceedings, pages (%P).
%A F. J. Lerch %A S. M. Klosko %T Gravity model improvement using laser data %J First Crustal Dynamics Working Group Meeting %C Goddard Space Flight Center %D |SEP|, 1981
%A F. J. Lerch %A S. M. Klosko %A G. B. Patel %T A refined gravity model from LAGEOS\/ \egroup(GEM-L2)\bgroup %I |NASA| %R Tech.\ Memo.\ TM 84986 %D |FEB|, 1983
%T Software Engineering Automated Tools Index %I |SRA| %F SRA %D 1982 %A R. E. Griswold %A J. F. Poage %A I. P. Polonsky %T The SNOBOL4 Programming Language %o (second edition) %I |PrHall| %D 1971
%A C. A. R. Hoare %T Procedures and parameters:\ An axiomatic approach %B Symposium on Semantics of Algorithmic Languages %E E. Engeler %P 102-116 %S |LNMath| %V 188 %D 1971
%E Heinz-Otto Peitgen %E Hans-Otto Walther %T Functional Differential Equations and Approximation of Fixed Points %D 1979 %S |LNMath| %V 730
%A Martin Brooks %T Automatic Generation of Test Data for Recursive Programs Having Simple Errors %R PhD Thesis %I Stanford |UNIV| %D 1980
%A Hypo T. Hetical %T Hypothesis and Conclusion %R preprint %O 14 pages
%A Hypo T. Hetical %T Hypothesis and Conclusion %J |INVEM| %O to appear