MLA

Jackson, Edith B., MD, The Halsey Brothers — Chicago Homeopathic Pharmacy. Homeopathic Pharmacy Case. Box 060. ca. 1850 - 1900. https://collections.library.yale.edu/catalog/17321880.

APA, 6th edition

Jackson, Edith B., MD, & The Halsey Brothers — Chicago Homeopathic Pharmacy. (["Box 060"])(ca. 1850 - 1900)[Homeopathic Pharmacy Case]. https://collections.library.yale.edu/catalog/17321880.