APA

Easum C. V., . (1952). Half-century of conflict. New York: Harper.

Chicago

Easum Chester Verne, . 1952. Half-century of conflict. New York: Harper.

Harvard

Easum C. V., . (1952). Half-century of conflict. New York: Harper.

MLA

Easum Chester Verne, . Half-century of conflict. New York: Harper. 1952.