*[http://www.cfsph.iastate.edu/Factsheets/pdfs/giardiasis.pdf Giardiasis factsheet from The Center for Food Security and Public Health, Iowa State University]
*[http://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/21300.htm The Merck Veterinary Manual - Giardiasis]
*[http://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/21300.htm The Merck Veterinary Manual - Giardiasis]
*[http://www.merck.com/mmhe/sec17/ch196/ch196h.html The Merck Online Medical Library - Giardiasis in humans]
*[http://www.merck.com/mmhe/sec17/ch196/ch196h.html The Merck Online Medical Library - Giardiasis in humans]