APA-Zitierstil (7. Ausg.)

Sanders, D., & Lovallo, L. (1989). The Agatha Christie companion: The complete guide to Agatha Christie's life and work (Rev. ed.). Berkley Books.

Chicago-Zitierstil (17. Ausg.)

Sanders, Dennis, und Len Lovallo. The Agatha Christie Companion: The Complete Guide to Agatha Christie's Life and Work. Rev. ed. New York: Berkley Books, 1989.

MLA-Zitierstil (9. Ausg.)

Sanders, Dennis, und Len Lovallo. The Agatha Christie Companion: The Complete Guide to Agatha Christie's Life and Work. Rev. ed. Berkley Books, 1989.