Παραπομπή APA

Campbell, J. C., & Heady, E. O. (1979). Potential economic and environmental impacts of alternative sediment control policies. Ames: Center for Agricultural and Rural Development. Iowa State University.

Παραπομπή Chicago Style

Campbell, Joseph C., and Earl O. Heady. Potential Economic and Environmental Impacts of Alternative Sediment Control Policies. Ames: Center for Agricultural and Rural Development. Iowa State University, 1979.

Παραπομπή MLA

Campbell, Joseph C., and Earl O. Heady. Potential Economic and Environmental Impacts of Alternative Sediment Control Policies. Ames: Center for Agricultural and Rural Development. Iowa State University, 1979.

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