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Michigan Department of Transportation (August 20, 2010). "How to Apply". Highway Programs. Michigan Department of Transportation. Archived from the original on August 16, 2014. Retrieved October 14, 2014.
Steudle, Kirk T. (April 24, 2014). "Annual Report on the Status of Michigan's Heritage Route Program"(PDF). Letter to Rick Snyder, Members of the Michigan State Legislature and Members of the Michigan State Transportation Commission. Lansing: Michigan Department of Transportation. Archived(PDF) from the original on August 16, 2014. Retrieved October 14, 2014.
Steudle, Kirk T. (December 22, 2014). "Annual Report on the Status of Michigan's Heritage Route Program"(PDF). Letter to Rick Snyder, Members of the Michigan State Legislature and Members of the Michigan State Transportation Commission. Lansing: Michigan Department of Transportation. Archived(PDF) from the original on March 4, 2016. Retrieved January 15, 2015.
Michigan Heritage Route Program (n.d.). Selection Criteria(PDF). Michigan Department of Transportation. Archived(PDF) from the original on March 5, 2014. Retrieved October 14, 2014.
Federal Highway Administration (n.d.). "Monroe Street (M-125)". America's Byways. Federal Highway Administration. Archived from the original on October 18, 2011. Retrieved July 14, 2012.
Michigan Department of Transportation (n.d.). Michigan Byways(PDF) (Map). Scale not given. Lansing: Michigan Department of Transportation. Archived(PDF) from the original on December 21, 2012. Retrieved June 19, 2014.
Michigan Legislature (n.d.). "House Bill 5072 (2013)". Michigan Legislative Council. Archived from the original on February 10, 2015. Retrieved December 17, 2014.
Leelanau Scenic Heritage Route Committee (n.d.). "The Leelanau Scenic Heritage Route"(PDF). Northwest Michigan Council of Governments. p. 6. Archived from the original on December 31, 2014. Retrieved July 14, 2012.
Tahquamenon Scenic Heritage Route Committee (2007). Tahquamenon Scenic Heritage Route Management Plan(PDF). Sault Ste. Marie, Michigan: Eastern UP Regional Planning & Development Commission. p. 2. Archived(PDF) from the original on October 27, 2014. Retrieved June 19, 2014.
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Barnett, LeRoy (2004). A Drive Down Memory Lane: The Named State and Federal Highways of Michigan. Allegan Forest, Michigan: Priscilla Press. pp. 51, 288. ISBN1-886167-24-9. OCLC57425393.