Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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