MLA

Hoggson & Robinson, 297 Chapel Street, New Haven. Broadside for lecture on Money and Morals at the Young Men's Christian Association by William Graham Sumner.. Circa 1874/1891. https://collections.library.yale.edu/catalog/10009319.

APA, 6th edition

Hoggson & Robinson, 297 Chapel Street, New Haven. (Circa 1874/1891)[Broadside for lecture on Money and Morals at the Young Men's Christian Association by William Graham Sumner.]. https://collections.library.yale.edu/catalog/10009319.