Παραπομπή APA

Willoughby , W. F. (1962). Principles of public administration. Central book depot.

Παραπομπή Chicago Style

Willoughby , W F. Principles of Public Administration. Allahabad: Central book depot, 1962.

Παραπομπή MLA

Willoughby , W F. Principles of Public Administration. Central book depot, 1962.