Ley, W. (1968). Rockets, missiles and men in space. Willy Ley.
シカゴスタイル引用形Ley, Willy. Rockets, Missiles and Men in Space. New York: Willy Ley, 1968.
MLA引用形式Ley, Willy. Rockets, Missiles and Men in Space. Willy Ley, 1968.
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APA引用形式