Readers should cite both the Bio-protocol preprint and the original research article where this protocol was used:

Stefanius, K(2020). Exosome isolation, Subcellular fractionation, and TCA precipitation. Bio-protocol Preprint. bio-protocol.org/prep501.
Stefanius, K., Servage, K., de Souza Santos, M., Gray, H. F., Toombs, J. E., Chimalapati, S., Kim, M. S., Malladi, V. S., Brekken, R. and Orth, K.(2019). Human pancreatic cancer cell exosomes, but not human normal cell exosomes, act as an initiator in cell transformation. eLIFE. DOI: 10.7554/eLife.40226