Cita APA (7th ed.)

Oller, J. W., & Richards, J. C. (1973). Focus on the learner: Pragmatic perspectives for the language teacher. Newbury House.

Cita Chicago (17th ed.)

Oller, John W., i Jack C. Richards. Focus on the Learner: Pragmatic Perspectives for the Language Teacher. Rowly, Mass: Newbury House, 1973.

Cita MLA (9th ed.)

Oller, John W., i Jack C. Richards. Focus on the Learner: Pragmatic Perspectives for the Language Teacher. Newbury House, 1973.