Cita APA (7th ed.)

Hofkes, E. H., & Visscher, J. T. (1986). Renewable energy sources for rural water supply. International Reference Centre for Community Water Supply and Sanitation.

Cita Chicago (17th ed.)

Hofkes, E. H., i J. T. Visscher. Renewable Energy Sources for Rural Water Supply. The Hague: International Reference Centre for Community Water Supply and Sanitation, 1986.

Cita MLA (9th ed.)

Hofkes, E. H., i J. T. Visscher. Renewable Energy Sources for Rural Water Supply. International Reference Centre for Community Water Supply and Sanitation, 1986.