Cita APA (7a ed.)

Foll, D. (1990). Contrast: Developing text awareness. Longman.

Cita Chicago Style (17a ed.)

Foll, D. Contrast: Developing Text Awareness. London: Longman, 1990.

Cita MLA (8a ed.)

Foll, D. Contrast: Developing Text Awareness. Longman, 1990.