APA (7th ed.) Citation

Sayers, D. L., & Eustace, R. (1968). The documents in the case. [Avon Books].

Chicago Style (17th ed.) Citation

Sayers, Dorothy L., and Robert Eustace. The Documents in the Case. [New York]: [Avon Books], 1968.

MLA (8th ed.) Citation

Sayers, Dorothy L., and Robert Eustace. The Documents in the Case. [Avon Books], 1968.