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

Huang, Y(2020). CRISPR-Cas9 sgRNA design and construction. Bio-protocol Preprint. bio-protocol.org/prep600.
Huang, Y., Liang, C., Ritz, D., Coelho, R., Septiadi, D., Estermann, M., Cumin, C., Rimmer, N., Schötzau, A., Núñez López, M., Fedier, A., Konantz, M., Vlajnic, T., Calabrese, D., Lengerke, C., David, L., Rothen-Rutishauser, B., Jacob, F. and Heinzelmann-Schwarz, V.(2020). Collagen-rich omentum is a premetastatic niche for integrin α2-mediated peritoneal metastasis. eLIFE. DOI: 10.7554/eLife.59442