Norfolk Southern Railroad (February 2006). "Locomotive Engineer Training Handbook" (PDF). Retrieved August 2, 2015. http://www.blet-ns.com/documents/agreements/utu/2006%20LET%20complete%20Workbook.pdf
"Diesel Locomotive Technology". Railway Technical Web Pages. Archived from the original on September 1, 2015. Retrieved August 2, 2015. https://web.archive.org/web/20150901062917/http://www.railway-technical.com/diesel.shtml
Moller, Jeffrey (October 2013). "The Future North American Locomotive Cab" (PDF). Association of American Railroads. Archived from the original (PDF) on September 24, 2015. Retrieved August 2, 2015. https://web.archive.org/web/20150924035630/http://www.intlrailsafety.com/vancouver/pdf/irsc13-95.pdf
Loumiet, James R.; Jungbauer, William G. (2005). Train Accident Reconstruction and FELA and Railroad Litigation (fourth ed.). Tucson, AZ: Lawyers & Judges Publishing Company. p. 91. ISBN 978-1-930056-93-0. 978-1-930056-93-0
CSX Transportation. "Railroad Dictionary". Archived from the original on August 1, 2015. Retrieved August 2, 2015. https://web.archive.org/web/20150801224321/http://www.csx.com/index.cfm/about-csx/company-overview/railroad-dictionary/?i=I
DiFiore, Amanda; Zaouk, Abdullatif; Punwani, S. K. (John) (October 2012). "ASME Proceedings, Rail Transportation Division: Next Generation Locomotive Cab". American Society of Mechanical Engineers. Retrieved August 2, 2015. http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1721899