Black, P. E. (2001). Conservation of water and related land resources (3rd ed.). Lewis Publishers.
Cita Chicago (17th ed.)Black, Peter E. Conservation of Water and Related Land Resources. 3rd ed. Boca Raton, Fla: Lewis Publishers, 2001.
Cita MLA (9th ed.)Black, Peter E. Conservation of Water and Related Land Resources. 3rd ed. Lewis Publishers, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.