Cita APA

Kirn, E., & Hartmann, P. (1990). Interactions 1: A speaking skills book (2nd ed.). New York: McGraw - Hill, Inc.

Citación estilo Chicago

Kirn, Elaine, y Pamela Hartmann. Interactions 1: A Speaking Skills Book. 2nd ed. New York: McGraw - Hill, Inc, 1990.

Cita MLA

Kirn, Elaine, y Pamela Hartmann. Interactions 1: A Speaking Skills Book. 2nd ed. New York: McGraw - Hill, Inc, 1990.