APA (7th ed.) Citation

Hadfield, J., & Hadfield, C. (1999). Simple speaking activities. Oxford University Press.

Chicago Style (17th ed.) Citation

Hadfield, Jill, and Charles Hadfield. Simple Speaking Activities. Oxford: Oxford University Press, 1999.

MLA (8th ed.) Citation

Hadfield, Jill, and Charles Hadfield. Simple Speaking Activities. Oxford University Press, 1999.