APA-viite (7. p.)

Gairns, R., & Redman, S. (2003). Natural English: Upper-intermediate student's book. Oxford University Press.

Chicago-viite (17. p.)

Gairns, Ruth, ja Stuart Redman. Natural English: Upper-intermediate Student's Book. Oxford: Oxford University Press, 2003.

MLA-viite (8. p.)

Gairns, Ruth, ja Stuart Redman. Natural English: Upper-intermediate Student's Book. Oxford University Press, 2003.