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

Schmutz, I(2021). CRISPR/Cas9-mediated targeting of TINF2 in RPE-1 cells. Bio-protocol Preprint. bio-protocol.org/prep759.
Schmutz, I., Mensenkamp, A. R., Takai, K. K., Haadsma, M., Spruijt, L., de Voer, R. M., Choo, S. S., Lorbeer, F. K., van Grinsven, E. J., Hockemeyer, D., Jongmans, M. C. and de Lange, T.(2020). TINF2 is a haploinsufficient tumor suppressor that limits telomere length. eLIFE. DOI: 10.7554/eLife.61235