Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (8th εκδ.)

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