Cita APA

Gairns, R., & Redman, S. (2005). Natural english: Pre - intermediate student's book. Oxford: Oxford Univ. Press.

Citación estilo Chicago

Gairns, Ruth, y Stuart Redman. Natural English: Pre - Intermediate Student's Book. Oxford: Oxford Univ. Press, 2005.

Cita MLA

Gairns, Ruth, y Stuart Redman. Natural English: Pre - Intermediate Student's Book. Oxford: Oxford Univ. Press, 2005.