توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

(1974). Man and his personal freedom ; Responsibility and creativity in art anf literature ; Problems of determinism ; The future of philosophy. Sofia Pr..

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Man and His Personal Freedom ; Responsibility and Creativity in Art Anf Literature ; Problems of Determinism ; The Future of Philosophy. Sofia: Sofia Pr., 1974.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Man and His Personal Freedom ; Responsibility and Creativity in Art Anf Literature ; Problems of Determinism ; The Future of Philosophy. Sofia Pr., 1974.