Citazione Stile APA (7a Edizione)

Gairns, R., & Redman, S. (2006). Natural English: Elementary student's book. Oxford University Press.

Citazione stile Chigago Style (17a edizione)

Gairns, Ruth, e Stuart Redman. Natural English: Elementary Student's Book. Oxford: Oxford University Press, 2006.

Citatione MLA (8a ed.)

Gairns, Ruth, e Stuart Redman. Natural English: Elementary Student's Book. Oxford University Press, 2006.