Ley, W. (1969). Rockets, Missiles an men in Space. New American Library.
シカゴスタイル引用形Ley, Willy. Rockets, Missiles an Men in Space. New York: New American Library, 1969.
MLA引用形式Ley, Willy. Rockets, Missiles an Men in Space. New American Library, 1969.
警告: この引用は必ずしも正確ではありません.