Cita APA (7a ed.)

Silen, W., & Cope, Z. (2005). Cope's early diagnosis of the acute abdomen (21st ed.). Oxford University Press.

Cita Chicago Style (17a ed.)

Silen, William, y Zachary Cope. Cope's Early Diagnosis of the Acute Abdomen. 21st ed. New York: Oxford University Press, 2005.

Cita MLA (9a ed.)

Silen, William, y Zachary Cope. Cope's Early Diagnosis of the Acute Abdomen. 21st ed. Oxford University Press, 2005.