Dyfyniad APA

Ley, W. (1969). Rockets, Missiles an men in Space. New American Library.

Dyfyniad Arddull Chicago

Ley, Willy. Rockets, Missiles an Men in Space. New York: New American Library, 1969.

Dyfyniad MLA

Ley, Willy. Rockets, Missiles an Men in Space. New American Library, 1969.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.