Não informado. (1970). Energy. U.S. Department of Commerce, National Technical Information Service.
Chicago-Zitierstil (17. Ausg.)Não informado. Energy. Springfield, Va: U.S. Department of Commerce, National Technical Information Service, 1970.
MLA-Zitierstil (8. Ausg.)Não informado. Energy. U.S. Department of Commerce, National Technical Information Service, 1970.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.