APA (7th ed.) Citation

Instytut Zachodni, Posen, & Gruchaman, B. (1959). Polish western territories. Instytut Zachodni.

Chicago Style (17th ed.) Citation

Instytut Zachodni, Posen, and Bohdan Gruchaman. Polish Western Territories. Poznan: Instytut Zachodni, 1959.

MLA (9th ed.) Citation

Instytut Zachodni, Posen, and Bohdan Gruchaman. Polish Western Territories. Instytut Zachodni, 1959.

Warning: These citations may not always be 100% accurate.