Gaya APA

Leifer, G., Burroughs, A. (2001). Maternity nursing : an introductory text (Ed. 8). Amerika: W.B. Saunders Company.

Gaya MLA

Leifer, Gloria., Burroughs, Arlene. "Maternity nursing : an introductory text". Ed. 8 Amerika: W.B. Saunders Company, 2001. Text.