APA (7th ed.) Citation

Castro, O., & Kimbrough, V. (1982). In Touch: A beginning american english series. Grupo editorial Norma.

Chicago Style (17th ed.) Citation

Castro, Oscar, and Victoria Kimbrough. In Touch: A Beginning American English Series. Bogotá: Grupo editorial Norma, 1982.

MLA (9th ed.) Citation

Castro, Oscar, and Victoria Kimbrough. In Touch: A Beginning American English Series. Grupo editorial Norma, 1982.

Warning: These citations may not always be 100% accurate.