APA

Jennings E. E., .An anatomy of leadership princes, heroes, and supermen. New York: McGraw- Hill Book Company.

Chicago

Jennings Eugene Emerson, .An anatomy of leadership princes, heroes, and supermen. New York: McGraw- Hill Book Company.

Harvard

Jennings E. E., .An anatomy of leadership princes, heroes, and supermen. New York: McGraw- Hill Book Company.

MLA

Jennings Eugene Emerson, .New York: McGraw- Hill Book Company. .