Gaya APA

Espey, W, F, R, E. (2007). Obstetric and Gynecology Clinics of North America . : Elsevier.

Gaya MLA

Espey, William, F., Rayburn,, Eve. "Obstetric and Gynecology Clinics of North America". : Elsevier, 2007. Koleksi Elektronik.