Chong, A., Hentschel, J., & Saavedra, J. (2004). Bundling services and household welfare in developing countries: The case of Peru. World Bank.
Chicago-referens (17:e uppl.)Chong, Alberto, Jesko Hentschel, och Jaime Saavedra. Bundling Services and Household Welfare in Developing Countries: The Case of Peru. [Washington, D.C: World Bank, 2004.
MLA-referens (9:e uppl.)Chong, Alberto, et al. Bundling Services and Household Welfare in Developing Countries: The Case of Peru. World Bank, 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.