Não informado. (1961). Satellite situation report. National Aeronautics and Space Administration, Goddard Space Flight Center.
Chicago-Zitierstil (17. Ausg.)Não informado. Satellite Situation Report. Greenbelt, Md: National Aeronautics and Space Administration, Goddard Space Flight Center, 1961.
MLA-Zitierstil (8. Ausg.)Não informado. Satellite Situation Report. National Aeronautics and Space Administration, Goddard Space Flight Center, 1961.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.