* de la Harpe, J., 2011.Harmonisation and alignment literature review.The Hague: IRC International Water and Sanitation Centre.
* de la Harpe, J. 2012. [httphttps://www.waterservicesthatlastircwash.org/contentsites/downloaddefault/1325files/8388/file/2012_BN_Making%20aid%20effective%20at%20the%20local%20level084-201502triple-s_bn05defweb.pdf Making aid effective at the local level], Briefing note no.5. IRC International Water and Sanitation Centre.
* Harmonisation and coordination [http://www.waterservicesthatlast.org/resources/building_blocks/harmonisation_coordination/harmonisation_and_coordination building block summary sheet]