Style de citation APA (7e éd.)

WILLIAMS OBSTETRICS & COX, S. M. [. (2002). Williams obstetrics: Study guide.-- ed.21. McGraw-Hill.

Style de citation Chicago (17e éd.)

WILLIAMS OBSTETRICS et Susan M. [et.al] COX. Williams Obstetrics: Study Guide.-- Ed.21. New York: McGraw-Hill, 2002.

Style de citation MLA (9e éd.)

WILLIAMS OBSTETRICS et Susan M. [et.al] COX. Williams Obstetrics: Study Guide.-- Ed.21. McGraw-Hill, 2002.