Cita APA (7a ed.)

Byrne, D., & Walsh, G. (1977). Pronunciation Practice: Students' Workbook (New ed.). Longman.

Cita Chicago Style (17a ed.)

Byrne, Donn, y Gordon Walsh. Pronunciation Practice: Students' Workbook. New ed. London: Longman, 1977.

Cita MLA (9a ed.)

Byrne, Donn, y Gordon Walsh. Pronunciation Practice: Students' Workbook. New ed. Longman, 1977.