MLA

Enu, Henri-Jean. Parapluie. Imprimerie "Le Souterrain", 0AD. https://collections.library.yale.edu/catalog/10079706.

APA, 6th edition

Enu, H.-J. (0 C.E.). Parapluie [Halftones, periodicals (AAT), Photomechanical prints]. Imprimerie "Le Souterrain", https://collections.library.yale.edu/catalog/10079706.