Cita APA (7th ed.)

Richards, J. C. (1984). Error analysis: Perspectives on second language acquisition. Longman.

Cita Chicago (17th ed.)

Richards, Jack C. Error Analysis: Perspectives on Second Language Acquisition. London: Longman, 1984.

Cita MLA (9th ed.)

Richards, Jack C. Error Analysis: Perspectives on Second Language Acquisition. Longman, 1984.