APA (7th ed.) Citation

Crystal, D., & Davy, D. (1969). Investigating english style. Longman.

Chicago Style (17th ed.) Citation

Crystal, David, and Derek Davy. Investigating English Style. Harlow: Longman, 1969.

MLA (8th ed.) Citation

Crystal, David, and Derek Davy. Investigating English Style. Longman, 1969.

Warning: These citations may not always be 100% accurate.