APA (7th ed.) Citation

Gairns R. Ruth. (2003). Natural English. Intermediate: Puzzle book (2nd ed.). New York, Oxford University Press, 2003.

Chicago Style (17th ed.) Citation

Gairns R. Ruth. Natural English. Intermediate: Puzzle Book. 2nd ed. New York, Oxford University Press, 2003, 2003.

MLA (9th ed.) Citation

Gairns R. Ruth. Natural English. Intermediate: Puzzle Book. 2nd ed. New York, Oxford University Press, 2003, 2003.