APA aipamena

UNITED NATION. (1980). RENEWABLE SOURCES OF ENERGY SOLAR.

Chicago Style aipamena

UNITED NATION. RENEWABLE SOURCES OF ENERGY SOLAR. 1980.

MLA aipamena

UNITED NATION. RENEWABLE SOURCES OF ENERGY SOLAR. 1980.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.