Gaya APA

Benson, R, C., Pernoll, M, L. (1994). handbook of obstetrics and gynecology (Ed. 9). Singapore: McGraw-Hill.

Gaya MLA

Benson, Ralph, C.., Pernoll, Martin, L.. "handbook of obstetrics and gynecology". Ed. 9 Singapore: McGraw-Hill, 1994. Text.