Não informado. (2020). Proceedings of the Scientific Section of the Toilet Goods Association. Toilet Goods Association.
Chicago-referens (17:e uppl.)Não informado. Proceedings of the Scientific Section of the Toilet Goods Association. Washington: Toilet Goods Association, 2020.
MLA-referens (8:e uppl.)Não informado. Proceedings of the Scientific Section of the Toilet Goods Association. Toilet Goods Association, 2020.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.