MLA

Info Undogmatischer Berliner Gruppen. 0AD. https://collections.library.yale.edu/catalog/10079693.

APA, 6th edition

Info undogmatischer Berliner Gruppen. (0 C.E.). [Covers (Illustrations), Halftones, periodicals (AAT), Photomechanical prints]. https://collections.library.yale.edu/catalog/10079693.