MLA

Palade, George E. Mitochondria Guinea Pig Pancreas Mitochondrial Granules. Yale University School of Medicine, 3AD. https://collections.library.yale.edu/catalog/15817935.

APA, 6th edition

Palade, G. E. (3 C.E.). Mitochondria Guinea Pig Pancreas mitochondrial granules [Transmission electron micrograph]. Yale University School of Medicine. https://collections.library.yale.edu/catalog/15817935.