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

Costell, M(2019). Platelet isolation and quantification. Bio-protocol Preprint. bio-protocol.org/prep78.
Benito-Jardón, M., Klapproth, S., Gimeno-LLuch, I., Petzold, T., Bharadwaj, M., Müller, D. J., Zuchtriegel, G., Reichel, C. A. and Costell, M.(2017). The fibronectin synergy site re-enforces cell adhesion and mediates a crosstalk between integrin classes. eLIFE. DOI: 10.7554/eLife.22264