Gaya APA

, ., Hertzberg, W, D, M, A, K, B, S. (2004). Ultrasound (22th.ed.). China: Mosby.

Gaya MLA

, ., Hertzberg, William, D., Middleton,, AlfredB., Kurtz,, Barbara, S.. "Ultrasound". 22th.ed. China: Mosby, 2004. Text.