Cita APA (7th ed.)

Allen, E. D., & Valette, R. M. (1977). Classroom techniques: Foreign languages and English as a second language. Harcourt Brace Jovanovich.

Cita Chicago (17th ed.)

Allen, Edward David, i Rebecca M. Valette. Classroom Techniques: Foreign Languages and English as a Second Language. New York: Harcourt Brace Jovanovich, 1977.

Cita MLA (9th ed.)

Allen, Edward David, i Rebecca M. Valette. Classroom Techniques: Foreign Languages and English as a Second Language. Harcourt Brace Jovanovich, 1977.