Cita APA (7a ed.)

Crystal, D., & Davy, D. (1973). Investigating English Style. Longman.

Cita Chicago Style (17a ed.)

Crystal, David, y Derek Davy. Investigating English Style. London: Longman, 1973.

Cita MLA (8a ed.)

Crystal, David, y Derek Davy. Investigating English Style. Longman, 1973.