Hubert Howe Bancroft, History of Arizona and New Mexico, 1530–1888 (San Francisco: History Company, 1889; facsimile ed., Albuquerque: Horn and Wallace, 1962). Herbert Eugene Bolton, ed., Spanish Exploration in the Southwest, 1542–1706 (New York: Scribner, 1908; rpt., New York: Barnes and Noble, 1959). Charles W. Hackett, ed., Pichardo's Treatise on the Limits of Louisiana and Texas (4 vols., Austin: University of Texas Press, 1931–46).
The following, adapted from the Chicago Manual of Style, 15th edition, is the preferred citation for this entry.
“Castillo, Diego del,”
Handbook of Texas Online,
accessed September 29, 2020,
Published by the Texas State Historical Association.