NIOSH Pocket Guide to Chemical Hazards. "#0296". National Institute for Occupational Safety and Health (NIOSH).
"Formic acid". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health. 4 Aralık 2014. 19 Mart 2015 tarihinde kaynağından arşivlendi. Erişim tarihi: 26 Mart 2015.
"Formic acid". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health. 4 Aralık 2014. 19 Mart 2015 tarihinde kaynağından arşivlendi. Erişim tarihi: 26 Mart 2015.