Gaya APA

Smith, N, C., Smith, A, P, M. (2006). Obstetric and Gynaecological Ultrasound Made Easy (2). Philadelphia: Churchill Livingston.

Gaya MLA

Smith, Norman, C.., Smith, A., Pat, M.. "Obstetric and Gynaecological Ultrasound Made Easy". 2 Philadelphia: Churchill Livingston, 2006. Text.