APA (7th ed.) Citation

Todd, L., & Hancock, I. F. (1986). International English usage. Croom Helm.

Chicago Style (17th ed.) Citation

Todd, Loreto, and Ian F. Hancock. International English Usage. London: Croom Helm, 1986.

MLA (9th ed.) Citation

Todd, Loreto, and Ian F. Hancock. International English Usage. Croom Helm, 1986.