APA (7th ed.) Citation

Citroen, H. A. (1951). European emigration overseas past and future. M. Nijhoff.

Chicago Style (17th ed.) Citation

Citroen, H. A. European Emigration Overseas Past and Future. The Hague: M. Nijhoff, 1951.

MLA (9th ed.) Citation

Citroen, H. A. European Emigration Overseas Past and Future. M. Nijhoff, 1951.

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