APA (7e ed.) Bronvermelding

Grzybowski, K. (1973). East-West trade.

Chicago (17e ed.) Bronvermelding

Grzybowski, Kazimierz. East-West Trade. Dobbs Ferry, N.Y., Oceana Publications [1974, 1973.

MLA (9e ed.) Bronvermelding

Grzybowski, Kazimierz. East-West Trade. 1973.