Παραπομπή APA

Krog, D. R. (1983). Effects of Livestock enterprises on the economics of soil and water conservation practices in Iowa. Ames: Center for Agricultural and Rural Development. Iowa State University.

Παραπομπή Chicago Style

Krog, David R. Effects of Livestock Enterprises On the Economics of Soil and Water Conservation Practices in Iowa. Ames: Center for Agricultural and Rural Development. Iowa State University, 1983.

Παραπομπή MLA

Krog, David R. Effects of Livestock Enterprises On the Economics of Soil and Water Conservation Practices in Iowa. Ames: Center for Agricultural and Rural Development. Iowa State University, 1983.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.