Style de citation APA (7e éd.)

Whitney, N. (1998). Open doors 1A: Student's book + workbook. Oxford University Press.

Style de citation Chicago (17e éd.)

Whitney, Norman. Open Doors 1A: Student's Book + Workbook. New York: Oxford University Press, 1998.

Style de citation MLA (9e éd.)

Whitney, Norman. Open Doors 1A: Student's Book + Workbook. Oxford University Press, 1998.