توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

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

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

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.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

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