MLA

Drábik, Jakub, and Peter Bielik. Operation Danube Reconsidered : The International Aspects of the Czechoslovak 1968 Crisis. Berlin: Ibidem Verlag, 2021.

APA

Drábik, J., & Bielik, P. (2021). Operation Danube Reconsidered : The International Aspects of the Czechoslovak 1968 Crisis. Berlin: Ibidem Verlag.

Chicago

Drábik, Jakub, and Peter Bielik. Operation Danube Reconsidered: The International Aspects of the Czechoslovak 1968 Crisis. Berlin: Ibidem Verlag, 2021.