APA (7th ed.) Citation

Christie, A., Treat, L., & Knight, K. M. (1948). There is a tide. Published for the Detective Book Club by W.J. Black.

Chicago Style (17th ed.) Citation

Christie, Agatha, Lawrence Treat, and Kathleen Moore Knight. There Is a Tide. New York: Published for the Detective Book Club by W.J. Black, 1948.

MLA (9th ed.) Citation

Christie, Agatha, et al. There Is a Tide. Published for the Detective Book Club by W.J. Black, 1948.