Cita APA (7a ed.)

Burke, K., & Brooks, J. (1999). Wavelenght: Elementary. Coursebook (1st published.). Longman.

Cita Chicago Style (17a ed.)

Burke, Kathy, y Julia Brooks. Wavelenght: Elementary. Coursebook. 1st published. Harlow: Longman, 1999.

Cita MLA (9a ed.)

Burke, Kathy, y Julia Brooks. Wavelenght: Elementary. Coursebook. 1st published. Longman, 1999.