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MLA

Crutchfield, Stephen R, et al. "Benefits of Safer Drinking Water : the Value of Nitrate Reduction." ,

APA

Crutchfield, S. R, Cooper, J., Hellerstein, D. R, United States, U. States, Department of Agriculture, D. of Agriculture, & Economic Research Service, E. Research Service. (1997). Benefits of safer drinking water : the value of nitrate reduction.

Chicago

Crutchfield, Stephen R., Joseph Cooper, Daniel R Hellerstein, United States, Department of Agriculture, and Economic Research Service. "Benefits of safer drinking water : the value of nitrate reduction" (1997):