APA (7th ed.) Citation

Todd, L., & Hancock, I. F. (1990). International English usage [electronic resource]. Routledge.

Chicago Style (17th ed.) Citation

Todd, Loreto, and Ian F. Hancock. International English Usage [electronic Resource]. London: Routledge, 1990.

MLA (9th ed.) Citation

Todd, Loreto, and Ian F. Hancock. International English Usage [electronic Resource]. Routledge, 1990.

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