Cita APA

Oller, J., & Richards, J. (1973). Focus on the learner: Pragmatic Perspectives for the Language Teacher. Massachusetts: Newbury House Publishers.

Citación estilo Chicago

Oller, John, and Jack Richards. Focus On the Learner: Pragmatic Perspectives for the Language Teacher. Massachusetts: Newbury House Publishers, 1973.

Cita MLA

Oller, John, and Jack Richards. Focus On the Learner: Pragmatic Perspectives for the Language Teacher. Massachusetts: Newbury House Publishers, 1973.