Cita APA (7a ed.)

Billows, F. L. (1961). The techniques of language teaching. Longman.

Cita Chicago Style (17a ed.)

Billows, F. L. The Techniques of Language Teaching. London: Longman, 1961.

Cita MLA (9a ed.)

Billows, F. L. The Techniques of Language Teaching. Longman, 1961.