MLA

Palade, George E., and Philip Siekevitz. Cell Fractionation RNP Particles with EDTA Guinea Pig Pancreas Pancreas. Yale University School of Medicine, 2AD. https://collections.library.yale.edu/catalog/15817830.

APA, 6th edition

Palade, G. E., & Siekevitz, P. (2 C.E.). Cell Fractionation RNP particles with EDTA guinea pig pancreas pancreas [Transmission electron micrograph]. Yale University School of Medicine. https://collections.library.yale.edu/catalog/15817830.