Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

Grzybowski, Kazimierz. East-West Trade. 1973.