Seifert, H. S. (1959). Space technology. John Wiley and Sons, INC.
Cita Chicago (17th ed.)Seifert, Howard S. Space Technology. New York: John Wiley and Sons, INC, 1959.
Cita MLA (9th ed.)Seifert, Howard S. Space Technology. John Wiley and Sons, INC, 1959.
Atenció: Aquestes cites poden no estar 100% correctes.