APA (7 ম সংস্করণ) উদ্ধৃতি

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

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

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.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

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