Gaya APA

Halasi-Kun, G, J, (., Widmer, K, (. (1980). Pollution and Water Resources Columbia University Seminar series . New York: Pergamon Press.

Gaya MLA

Halasi-Kun, George, J, (editor)., Widmer, Kemble, (editor). "Pollution and Water Resources Columbia University Seminar series". New York: Pergamon Press, 1980. Text.