Vacuüm

MLA

Daelman, Jos, and Cel Overberghe. Vacuüm. Antwerpen: Contramine, 1977.

APA

Daelman, J., & Overberghe, C. (1977). Vacuüm. Antwerpen: Contramine.

Chicago

Daelman, Jos, and Cel Overberghe. Vacuüm. Antwerpen: Contramine, 1977.