APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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