Não informado. (2000). Space energy and transportation. Sunsat Energy Council.
Chicago (17e ed.) BronvermeldingNão informado. Space Energy and Transportation. Arlington, Va: Sunsat Energy Council, 2000.
MLA (8e ed.) BronvermeldingNão informado. Space Energy and Transportation. Sunsat Energy Council, 2000.
Let op: Deze citaties zijn niet altijd 100% accuraat.