APA (7th ed.) Citation

Terrell, Lexus, & Citron. (1986). French at your fingertips. Routledge.

Chicago Style (17th ed.) Citation

Terrell, Lexus, and Citron. French at Your Fingertips. London: Routledge, 1986.

MLA (8th ed.) Citation

Terrell, et al. French at Your Fingertips. Routledge, 1986.