Cite

If they'll only be good

MLA

Ehrhart, S. D. (Samuel D.), ca. 1862-1937, J. Ottman Lithographic Company, Keppler & Schwarzmann. If they'll only be good. 1900 January 31. https://collections.library.yale.edu/catalog/2066777.

APA, 6th edition

Ehrhart, S. D. (Samuel D.), ca. 1862-1937, & J. Ottman Lithographic Company, & Keppler & Schwarzmann. (1900 January 31)[If they'll only be good]. https://collections.library.yale.edu/catalog/2066777.