Gaya APA

Koniak, R, M. (1992). Maternity Nursing 17th edition (ed. 17). Amerika: J. B Lippincott Company.

Gaya MLA

Koniak, Redeer, Martin. "Maternity Nursing 17th edition". ed. 17 Amerika: J. B Lippincott Company, 1992. Buku Text.