Gaya APA

al., I, M, B, E. (1995). Maternity nursing. -- 4th ed. . St. Louis: Mosby-Year Book, Inc..

Gaya MLA

al., Irene, M., Bobak,, Et.. "Maternity nursing. -- 4th ed.". St. Louis: Mosby-Year Book, Inc., 1995. Text.