Cita APA (7a ed.)

Rowdon, B. (1999). Wavelenght: Elementary. Workbook (1st published.). Longman.

Cita Chicago Style (17a ed.)

Rowdon, Ben. Wavelenght: Elementary. Workbook. 1st published. Harlow: Longman, 1999.

Cita MLA (9a ed.)

Rowdon, Ben. Wavelenght: Elementary. Workbook. 1st published. Longman, 1999.