APA (7th ed.) Citation

Simpson, D. (1998). Once too often: An Inspector Luke Thanet novel (1st U.S. ed.). Scribner.

Chicago Style (17th ed.) Citation

Simpson, Dorothy. Once Too Often: An Inspector Luke Thanet Novel. 1st U.S. ed. New York, NY: Scribner, 1998.

MLA (9th ed.) Citation

Simpson, Dorothy. Once Too Often: An Inspector Luke Thanet Novel. 1st U.S. ed. Scribner, 1998.