MLA

Palade, George E. Intestine Rat Colon Apical Microvilli. Yale University School of Medicine, 2AD. https://collections.library.yale.edu/catalog/15817906.

APA, 6th edition

Palade, G. E. (2 C.E.). Intestine Rat colon apical microvilli [Transmission electron micrograph]. Yale University School of Medicine. https://collections.library.yale.edu/catalog/15817906.