Cita APA (7a ed.)

Crystal, D., & Davy, D. (1992). Investigating English style (1st published, 12th impression.). Longman.

Cita Chicago Style (17a ed.)

Crystal, David, y Derek Davy. Investigating English Style. 1st published, 12th impression. Harlow: Longman, 1992.

Cita MLA (9a ed.)

Crystal, David, y Derek Davy. Investigating English Style. 1st published, 12th impression. Longman, 1992.