Não informado. (1961). Satellite situation report. National Aeronautics and Space Administration, Goddard Space Flight Center.
Citação do estilo Chicago (17ª ed.)Não informado. Satellite Situation Report. Greenbelt, Md: National Aeronautics and Space Administration, Goddard Space Flight Center, 1961.
Citação MLA (8ª ed.)Não informado. Satellite Situation Report. National Aeronautics and Space Administration, Goddard Space Flight Center, 1961.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.