Unesco & Singh, M. (1996). Renewable energy of the sun. UNESCO.
Chicago Style aipamenaUnesco and Madanjeet Singh. Renewable Energy of the Sun. Paris: UNESCO, 1996.
MLA aipamenaUnesco and Madanjeet Singh. Renewable Energy of the Sun. UNESCO, 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.