Bill Groneman, Alamo Defenders (Austin: Eakin, 1990). Amelia W. Williams, A Critical Study of the Siege of the Alamo and of the Personnel of Its Defenders (Ph.D. dissertation, University of Texas, 1931; rpt., Southwestern Historical Quarterly 36–37 [April 1933-April 1934]).
The following, adapted from the Chicago Manual of Style, 15th edition, is the preferred citation for this entry.
Bill Groneman,
“Allen, Robert,”
Handbook of Texas Online,
accessed January 22, 2021,
https://www.tshaonline.org/handbook/entries/allen-robert.
Published by the Texas State Historical Association.