Opus international.
MLA
Fall, Georges. Opus International. Éditions Georges Fall, 0AD. https://collections.library.yale.edu/catalog/10079723.
APA, 6th edition
Fall, G. (0 C.E.). Opus international. [Covers (Illustrations), Halftones, Historiography, illustrations (AAT), Magazine covers, magazines (periodicals) (AAT), Photomechanical prints]. Éditions Georges Fall, https://collections.library.yale.edu/catalog/10079723.