APA Format
Friedman, Gary D.
. (1994; 2004). Primer of epidemiology. New York : McGraw-Hill
MLA Format
Friedman, Gary D.
. Primer of epidemiology. New York : McGraw-Hill, 1994; 2004
Australian/Harvard Format
Friedman, Gary D.
. 1994; 2004. Primer of epidemiology. McGraw-Hill, New York
Warning: These citations may not always be 100% accurate.