Παραπομπή σε μορφή APA (7η εκδ.)

Ritter, W. F., & Shirmohammadi, A. (2001). Agricultural nonpoint source pollution: Watershed management and hydrology. Lewis Publishers.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Ritter, William F., και Adel Shirmohammadi. Agricultural Nonpoint Source Pollution: Watershed Management and Hydrology. Boca Raton [Florida]: Lewis Publishers, 2001.

Παραπομπή σε μορφή MLA (8th εκδ.)

Ritter, William F., και Adel Shirmohammadi. Agricultural Nonpoint Source Pollution: Watershed Management and Hydrology. Lewis Publishers, 2001.