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

Rawlins, E(2021). Whole mount immunostaining of organoids and embryonic lungs. Bio-protocol Preprint. bio-protocol.org/prep1307.
Nikolić, M. Z., Caritg, O., Jeng, Q., Johnson, J., Sun, D., Howell, K. J., Brady, J. L., Laresgoiti, U., Allen, G., Butler, R., Zilbauer, M., Giangreco, A. and Rawlins, E. L.(2017). Human embryonic lung epithelial tips are multipotent progenitors that can be expanded in vitro as long-term self-renewing organoids. eLIFE. DOI: 10.7554/eLife.26575