Cita APA (7a ed.)

Byrne, D. a. W. (1873). Pronunciation practice. Longman.

Cita Chicago Style (17a ed.)

Byrne, Donn and Walsh. Pronunciation Practice. Londres, Inglaterra: Longman, 1873.

Cita MLA (9a ed.)

Byrne, Donn and Walsh. Pronunciation Practice. Longman, 1873.