Cita APA (7a ed.)

Crystal, D., & Davy, D. (1969). Investigating English style (1st. ed.). Longman.

Cita Chicago Style (17a ed.)

Crystal, David, y Derek Davy. Investigating English Style. 1st. ed. London: Longman, 1969.

Cita MLA (8a ed.)

Crystal, David, y Derek Davy. Investigating English Style. 1st. ed. Longman, 1969.