Παραπομπή σε μορφή APA (7η εκδ.)

Piotrowski, R. (1978). Cartels and trusts: Their origin and historical development from the economic and legal aspects. Porcupine Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Piotrowski, Roman. Cartels and Trusts: Their Origin and Historical Development from the Economic and Legal Aspects. Philadelphia: Porcupine Press, 1978.

Παραπομπή σε μορφή MLA (9th εκδ.)

Piotrowski, Roman. Cartels and Trusts: Their Origin and Historical Development from the Economic and Legal Aspects. Porcupine Press, 1978.