Cita APA (7a ed.)

Byrne, D. (1977). Pronunciation practice: Students'workbook (New ed.). Longman.

Cita Chicago Style (17a ed.)

Byrne, Donn. Pronunciation Practice: Students'workbook. New ed. London: Longman, 1977.

Cita MLA (8a ed.)

Byrne, Donn. Pronunciation Practice: Students'workbook. New ed. Longman, 1977.