Παραπομπή APA

James, L. D., & Lee, R. R. (1971). Economics of water resources planning. TMH.

Παραπομπή Chicago Style

James, L Douglas, και Robert R. Lee. Economics of Water Resources Planning. TMH, 1971.

Παραπομπή MLA

James, L Douglas, και Robert R. Lee. Economics of Water Resources Planning. TMH, 1971.