Cita APA (7a ed.)

Czierpka, J., & Bluma, L. (2021). Coal Mining in Boom and Crisis since 1945. Walter de Gruyter GmbH.

Cita Chicago Style (17a ed.)

Czierpka, Juliane, y Lars Bluma. Coal Mining in Boom and Crisis Since 1945. Berlin/München/Boston: Walter de Gruyter GmbH, 2021.

Cita MLA (9a ed.)

Czierpka, Juliane, y Lars Bluma. Coal Mining in Boom and Crisis Since 1945. Walter de Gruyter GmbH, 2021.