Não informado. NASA Technical Note. National Aeronautics and Space Administration.
Chicago (17e ed.) BronvermeldingNão informado. NASA Technical Note. Washington: National Aeronautics and Space Administration.
MLA (8e ed.) BronvermeldingNão informado. NASA Technical Note. National Aeronautics and Space Administration.
Let op: Deze citaties zijn niet altijd 100% accuraat.