Hofkes, E. H., & Visscher, J. T. (1986). Renewable energy sources for rural water supply. International Reference Centre for Community Water Supply and Sanitation.
Citace podle Chicago (17th ed.)Hofkes, E. H., a J. T. Visscher. Renewable Energy Sources for Rural Water Supply. The Hague: International Reference Centre for Community Water Supply and Sanitation, 1986.
Citace podle MLA (9th ed.)Hofkes, E. H., a J. T. Visscher. Renewable Energy Sources for Rural Water Supply. International Reference Centre for Community Water Supply and Sanitation, 1986.
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