Cita APA (7a ed.)

Christie, A., & Dellaporta, P. (2009). The secret adversary, with ebook (Unabridged.). Tantor Media.

Cita Chicago Style (17a ed.)

Christie, Agatha, y Penelope Dellaporta. The Secret Adversary, with Ebook. Unabridged. Old Saybrook: Tantor Media, 2009.

Cita MLA (8a ed.)

Christie, Agatha, y Penelope Dellaporta. The Secret Adversary, with Ebook. Unabridged. Tantor Media, 2009.

Precaución: Estas citas no son 100% exactas.