APA (7th ed.) Citation

Heacock, P. (1989). Which word when ? Dell Publishers.

Chicago Style (17th ed.) Citation

Heacock, Paul. Which Word When ? New York: Dell Publishers, 1989.

MLA (9th ed.) Citation

Heacock, Paul. Which Word When ? Dell Publishers, 1989.

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