APA (7th ed.) Citation

Knightley, P. The second oldest profession: Spies and spying in the twentieth century (1st American ed.). Norton.

Chicago Style (17th ed.) Citation

Knightley, Phillip. The Second Oldest Profession: Spies and Spying in the Twentieth Century. 1st American ed. New York [u.a.]: Norton.

MLA (9th ed.) Citation

Knightley, Phillip. The Second Oldest Profession: Spies and Spying in the Twentieth Century. 1st American ed. Norton.