MLA

Peek-a-Boo [Graphic]. Published by Currier & Ives, 152 Nassau St. New York, Entered according to Act of Congress AD.1868, by Currier & Ives, in the Clerks Office of the District Court of the United States, for the Southern District of New York, 0AD. https://collections.library.yale.edu/catalog/17338471.

APA, 6th edition

Peek-a-boo [graphic]. (0 C.E.). [Lithographs]. Published by Currier & Ives, 152 Nassau St. New York, Entered according to Act of Congress AD.1868, by Currier & Ives, in the Clerks Office of the District Court of the United States, for the Southern District of New York. https://collections.library.yale.edu/catalog/17338471.