Joel, A. (2000). Surface runoff: A water source for poor farming communities in drylands. Swedish University of Agricultural Sciences.
Chicago Style aipamenaJoel, Abraham. Surface Runoff: A Water Source for Poor Farming Communities in Drylands. Uppsala: Swedish University of Agricultural Sciences, 2000.
MLA aipamenaJoel, Abraham. Surface Runoff: A Water Source for Poor Farming Communities in Drylands. Swedish University of Agricultural Sciences, 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.