APA (7th ed.) Citation

Hajnal, H. (1920). The Danube: Its Historical, Political and Economic Importance. Springer Netherlands.

Chicago Style (17th ed.) Citation

Hajnal, Henry. The Danube: Its Historical, Political and Economic Importance. Dordrecht: Springer Netherlands, 1920.

MLA (9th ed.) Citation

Hajnal, Henry. The Danube: Its Historical, Political and Economic Importance. Springer Netherlands, 1920.

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