Paulos Gregorios. (1972). The freedom of man: An inquiry into some roots of the tension between freedom and authority in our society. Westminster Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Paulos Gregorios. The Freedom of Man: An Inquiry into Some Roots of the Tension Between Freedom and Authority in Our Society. Philadelphia: Westminster Press, 1972.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Paulos Gregorios. The Freedom of Man: An Inquiry into Some Roots of the Tension Between Freedom and Authority in Our Society. Westminster Press, 1972.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.