APA (7th ed.) Citation

Kirby, W., Helsel, D., & Gilroy, E. J. (1990). DISCUSSION. Blackwell Publishing Ltd.

Chicago Style (17th ed.) Citation

Kirby, W., D. Helsel, and E. J. Gilroy. DISCUSSION. Oxford, UK: Blackwell Publishing Ltd, 1990.

MLA (9th ed.) Citation

Kirby, W., et al. DISCUSSION. Blackwell Publishing Ltd, 1990.