Cita APA (7th ed.)

Kingdon, R. (1958). English intonation practice. Longmans.

Cita Chicago (17th ed.)

Kingdon, Roger. English Intonation Practice. Londres: Longmans, 1958.

Cita MLA (9th ed.)

Kingdon, Roger. English Intonation Practice. Longmans, 1958.