Style de citation APA (7e éd.)

Crystal D. David. (1997). English as a Global Language. New York, Cambridge University Press, 1997.

Style de citation Chicago (17e éd.)

Crystal D. David. English as a Global Language. New York, Cambridge University Press, 1997, 1997.

Style de citation MLA (9e éd.)

Crystal D. David. English as a Global Language. New York, Cambridge University Press, 1997, 1997.