Firsching, Jay (October 6, 2003). "Tower Conoco". OldGas.com. Primarily Petroliana. Archived from the original on August 30, 2001. Retrieved March 22, 2008.
Firsching, Jay (October 6, 2003). "Tower Conoco". OldGas.com. Primarily Petroliana. Archived from the original on August 30, 2001. Retrieved March 22, 2008.
Witzel, Michael (2003). "Chapter 2: Filling Circumstances: Highway Pump and Circumstance". Route 66 Remembered. Osceola, Wisconsin: Motorbooks International. p. 79. ISBN0-7603-1498-5. OCLC51234105.
Woolley, Bryan (2004). "Mother Road: Route 66 Museum, Cadillac Ranch, Phillips 66". Texas Road Trip: Stories From Across the Great State and a Few Personal Reflections. Fort Worth, Texas: TCU Press. p. 66. ISBN0-87565-291-3. OCLC54537067.
Scott, Quinta (December 2001). "The Architecture of Americas Highway: Streamline Moderne, U.S. Highway 66, Route 66". Along Route 66. Osceola, Wisconsin: University of Oklahoma Press. p. 23. ISBN0-8061-3383-X. OCLC45842985.