Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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

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