Gaya APA

Ladewig, P, W. et al (1990). Essentials of Maternal Newborn Nursing (Ed. 2). California: Addison-Wesley Nursing.

Gaya MLA

Ladewig, Patricia, Wieland. et al. "Essentials of Maternal Newborn Nursing". Ed. 2 California: Addison-Wesley Nursing, 1990. Text.