Cita APA

Keller, D. P., & Thrush, E. A. (1987). Interactions 1: A speaking activities book. New York: Random House.

Citación estilo Chicago

Keller, Deborah Poole, y Emily Austin Thrush. Interactions 1: A Speaking Activities Book. New York: Random House, 1987.

Cita MLA

Keller, Deborah Poole, y Emily Austin Thrush. Interactions 1: A Speaking Activities Book. New York: Random House, 1987.