Cita APA

Castro, O., & Kimbrough, V. (1979). In touch: A beginning American English series, student's book 1. N.Y.: Longman.

Citación estilo Chicago

Castro, Oscar, y Victoria Kimbrough. In Touch: A Beginning American English Series, Student's Book 1. N.Y.: Longman, 1979.

Cita MLA

Castro, Oscar, y Victoria Kimbrough. In Touch: A Beginning American English Series, Student's Book 1. N.Y.: Longman, 1979.