APA (7th ed.) Citation

Whitehead, G., & Whitehead, D. (1993). English for business. Mode Simple Books.

Chicago Style (17th ed.) Citation

Whitehead, Geoffrey, and David Whitehead. English for Business. Mode Simple Books, 1993.

MLA (8th ed.) Citation

Whitehead, Geoffrey, and David Whitehead. English for Business. Mode Simple Books, 1993.

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