Cita APA

Jackson, V. B., & Heckler, B. W. (1991). Intercom 2000: Testing Program. Boston, MA: Heinle&Heinle.

Chicago Style Citation

Jackson, Vicki B., i Belinda W. Heckler. Intercom 2000: Testing Program. Boston, MA: Heinle&Heinle, 1991.

Cita MLA

Jackson, Vicki B., i Belinda W. Heckler. Intercom 2000: Testing Program. Boston, MA: Heinle&Heinle, 1991.

Atenció: Aquestes cites poden no estar 100% correctes.