APA

Cronin A. J., . (19511937). The citadel. Boston: Little, Brown, and Company.

Chicago

Cronin A J, . 19511937. The citadel. Boston: Little, Brown, and Company.

Harvard

Cronin A. J., . (19511937). The citadel. Boston: Little, Brown, and Company.

MLA

Cronin A J, . The citadel. Boston: Little, Brown, and Company. 19511937.