(en) « Historic 6666 Ranch Almost Twice the Size of Chicago Gets the Perfect Steward », Texas Monthly, (lire en ligne, consulté le )
tshaonline.org
H. Allen Anderson, "FOUR SIXES RANCH," Handbook of Texas Online (https://tshaonline.org/handbook/online/articles/apf01), accessed November 09, 2014. Uploaded on June 12, 2010. Published by the Texas State Historical Association.
H. Allen Anderson, "DIXON CREEK (CARSON COUNTY)," Handbook of Texas Online (https://tshaonline.org/handbook/online/articles/rbd56), accessed November 11, 2014. Uploaded on June 12, 2010. Published by the Texas State Historical Association.
