Dyfyniad APA

Kalp, E. S., & Morgan, R. M. (1941). Defense of the western hemisphere. Ginn and Company.

Dyfyniad Arddull Chicago

Kalp, Earl S., and Robert M. Morgan. Defense of the Western Hemisphere. Boston, New York [etc.]: Ginn and Company, 1941.

Dyfyniad MLA

Kalp, Earl S., and Robert M. Morgan. Defense of the Western Hemisphere. Ginn and Company, 1941.

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