MLA

Pierrot Avocat. Édition Phototypie A. Bergeret et Cie, 0AD. https://collections.library.yale.edu/catalog/32550955.

APA, 6th edition

Pierrot avocat. (0 C.E.). [Humor, Caricatures and cartoons, Postcards]. Édition Phototypie A. Bergeret et Cie. https://collections.library.yale.edu/catalog/32550955.