1. National Toxicology Program. “13th Report on Carcinogens, Formaldehyde.” Available at http://ntp.niehs.nih.gov/ntp/roc/content/profiles/formaldehyde.pdf (acc-essed October 14, 2015).
2. National Research Council. “Review of the Environmental Protection Agency's Draft IRIS Assessment of Formaldehyde.” Available at http://www.ncbi.nlm.nih.gov/books/NBK208227/ (accessed October 14, 2015).