APA (7th ed.) Citation

Hirsch, R. M., Alley, W. M., & Wilber, W. G. (1988). Concepts for a national water-quality assessment program.

Chicago Style (17th ed.) Citation

Hirsch, Robert M., William M. Alley, and William G. Wilber. Concepts for a National Water-quality Assessment Program. Denver, CO, 1988.

MLA (9th ed.) Citation

Hirsch, Robert M., et al. Concepts for a National Water-quality Assessment Program. 1988.