Cita APA (7a ed.)

Billows, F. L. (1961). The Techniques of language teaching (1a. ed.). Longman.

Cita Chicago Style (17a ed.)

Billows, F. L. The Techniques of Language Teaching. 1a. ed. Londres: Longman, 1961.

Cita MLA (9a ed.)

Billows, F. L. The Techniques of Language Teaching. 1a. ed. Longman, 1961.