توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Fischel, W. J. (1967). Ibn Khaldun in Egypt: His public functions and his historical research. University of California Press.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Fischel, Walter Joseph. Ibn Khaldun in Egypt: His Public Functions and His Historical Research. Berkeley: University of California Press, 1967.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Fischel, Walter Joseph. Ibn Khaldun in Egypt: His Public Functions and His Historical Research. University of California Press, 1967.