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British Columbia. (en) Guidelines for Ear and Body Piercing. Public and Preventive Health Division (2000)

ADA Division of Communications. (en) Oral piercing and health. ADA Business Enterprises Inc. (2001)

Socialstyrelsen. (sv) Yrkesmässig hygienisk verksamhet – Piercing, tatuering, fotvård, massage m.m. (2006)

Association of Professional Piercers. (en) Aftercare Guidelines for Oral Piercings. (2000)

The Association of Professional Piercers. (en) Choosing a Piercer. (1999)

Gurl (en) Fast facts on body piercing. (2008)

University of Pennsylvania Museum of Archaeology and Anthropology. (en) Body Modification Ancient and Modern (2007)