Wallace, W. (1968). Prolegomena to the study of Hegel's philosophy and especially of his logic. (Second edition.). Russell & Russell.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Wallace, William. Prolegomena to the Study of Hegel's Philosophy and Especially of His Logic. Second edition. New York: Russell & Russell, 1968.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Wallace, William. Prolegomena to the Study of Hegel's Philosophy and Especially of His Logic. Second edition. Russell & Russell, 1968.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.