Certo, S. C., & Samuel C. Certo. (2008). Supervision: Concepts and skill-building (6th ed.). McGraw-Hill/Irwin, a business unit of The McGraw-Hill Companies, Inc..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Certo, Samuel C., و Samuel C. Certo. Supervision: Concepts and Skill-building. 6th ed. Boston: McGraw-Hill/Irwin, a business unit of The McGraw-Hill Companies, Inc., 2008.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Certo, Samuel C., و Samuel C. Certo. Supervision: Concepts and Skill-building. 6th ed. McGraw-Hill/Irwin, a business unit of The McGraw-Hill Companies, Inc., 2008.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.