Παραπομπή σε μορφή APA (7η εκδ.)

Willoughby, w. f. (1973). principles of public administration: with special reference to the national and state government: Of the united states. Central book depot.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Willoughby, w f. Principles of Public Administration: With Special Reference to the National and State Government: Of the United States. Allahabad: Central book depot, 1973.

Παραπομπή σε μορφή MLA (9th εκδ.)

Willoughby, w f. Principles of Public Administration: With Special Reference to the National and State Government: Of the United States. Central book depot, 1973.