Ley, W. (1968). Rockets, Missiles, and Men in Space. New York: The New American Library.
استشهاد بنمط شيكاغوLey, Willy. Rockets, Missiles, and Men in Space. New York: The New American Library, 1968.
MLA استشهادLey, Willy. Rockets, Missiles, and Men in Space. New York: The New American Library, 1968.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.