APA (7th ed.) Citation

Philadelphia, A. C. H. S. o. (1897). Advertisement, three lecture cards, American Catholic Historical Society, [1897?].

Chicago Style (17th ed.) Citation

Philadelphia, American Catholic Historical Society of. Advertisement, Three Lecture Cards, American Catholic Historical Society, [1897?]. 1897.

MLA (8th ed.) Citation

Philadelphia, American Catholic Historical Society of. Advertisement, Three Lecture Cards, American Catholic Historical Society, [1897?]. 1897.

Warning: These citations may not always be 100% accurate.