APA

Gairns R., Redman S., . (2005). Natural English. Pre-intermediate. New York: Oxford University Press.

Chicago

Gairns R, Redman S, . 2005. Natural English. Pre-intermediate. New York: Oxford University Press.

Harvard

Gairns R., Redman S., . (2005). Natural English. Pre-intermediate. New York: Oxford University Press.

MLA

Gairns R, Redman S, . Natural English. Pre-intermediate. New York: Oxford University Press. 2005.