MLA

Vocations d'Enfants. Phototypie A. Bergeret & Cie, 0AD. https://collections.library.yale.edu/catalog/33531970.

APA, 6th edition

Vocations d'enfants. (0 C.E.). [Caricatures and cartoons, Illustrated law Children, Postcards]. Phototypie A. Bergeret & Cie. https://collections.library.yale.edu/catalog/33531970.