Παραπομπή σε μορφή APA (7η εκδ.)

Cohin, P. (1971). Free rings and their relations. Academic Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Cohin, P.M. Free Rings and Their Relations. London: Academic Press, 1971.

Παραπομπή σε μορφή MLA (8th εκδ.)

Cohin, P.M. Free Rings and Their Relations. Academic Press, 1971.