Tillman, G. (1981). Environmentally sound small-scale water projects. Coordination in Development ; Volunteers in Technical Assistance.
Cita Chicago (17th ed.)Tillman, Gus. Environmentally Sound Small-scale Water Projects. [New York, N.Y.] : [Mt. Rainier, Md.]: Coordination in Development ; Volunteers in Technical Assistance, 1981.
Cita MLA (8th ed.)Tillman, Gus. Environmentally Sound Small-scale Water Projects. Coordination in Development ; Volunteers in Technical Assistance, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.