APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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