1. Gastelaars, M. (1996). The water closet: Public and private meanings. Science as Culture, 5(4), 483–505.
2. Hegger, D. (2007). Greening sanitary systems: an end-user perspective. Ph.D. thesis, Wageningen University, Wageningen.
3. Lens, P., Zeeman, G., & Lettinga, G. (eds). (2001). Decentralized sanitation and reuse: concepts, systems and implementation. London: IWA Publishing.
4. Melosi, M. (2000). The sanitary city. Urban infrastructure in America from colonial times to the present. Baltimore, MD: The Johns Hopkins University Press.
5. Shove, E. (1997). Revealing the invisible: sociology, energy and the environment. In M. Redclift & G. Woodgate (Eds.), The international handbook of environmental sociology (pp. 261–273). Cheltenham: Edward Elgar.