Chirinos, Fanny (January 2, 2009). "Sinton bypass route complete". Corpus Christi Caller-Times. Retrieved August 10, 2014.
construction.com
texas.construction.com
Jay, Mary Lou (May 2007). "Take to the highway". McGraw-Hill Construction. Retrieved August 11, 2014.
state.tx.us
dot.state.tx.us
Transportation Planning and Programming Division (n.d.). "State Highway No. 89". Highway Designation Files. Texas Department of Transportation. Retrieved June 21, 2015. The figure of 6.6 miles (10.6 km) given in the designation file does not agree with the constructed mileage.
Transportation Planning and Programming Division (2018). Texas County Mapbook(PDF) (Map) (2018 ed.). 1:72,224. Texas Department of Transportation. p. 2124. Retrieved December 23, 2022.
Transportation Planning and Programming Division (2018). Texas County Mapbook(PDF) (Map) (2018 ed.). 1:72,224. Texas Department of Transportation. p. 2108. Retrieved December 23, 2022.
"SH 89 Project Begins". Texas Department of Transportation. May 19, 2006. Archived from the original on February 17, 2007. Retrieved August 10, 2014.