APA
Pitkin R. M. (., Zlatrik F. J. (., . (1979). The year book of obstetrics and gynecology. 1979. Chicago: Yearbook Medical Publishers Inc.
Chicago
Pitkin Roy M (ed), Zlatrik Frank J (ed), . 1979. The year book of obstetrics and gynecology. 1979. Chicago: Yearbook Medical Publishers Inc.
Harvard
Pitkin R. M. (., Zlatrik F. J. (., . (1979). The year book of obstetrics and gynecology. 1979. Chicago: Yearbook Medical Publishers Inc.
MLA
Pitkin Roy M (ed), Zlatrik Frank J (ed), . The year book of obstetrics and gynecology. 1979. Chicago: Yearbook Medical Publishers Inc. 1979.