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

Gaiti, F, Degnan, B and Tanurdžić, M(2020). Chromatin immunoprecipitation (ChIP) protocol for the sponge Amphimedon queenslandica. Bio-protocol Preprint. bio-protocol.org/prep611.
Gaiti, F., Jindrich, K., Fernandez-Valverde, S. L., Roper, K. E., Degnan, B. M. and Tanurdžić, M.(2017). Landscape of histone modifications in a sponge reveals the origin of animal cis-regulatory complexity. eLIFE. DOI: 10.7554/eLife.22194