"An Interview With Virgil W. Earp". Arizona Affairs. Archived from the original on April 23, 2009. Retrieved May 24, 2011. First published in Real West Magazine in January 1982. Annotated by Robert F. Palmquist
"An Interview With Virgil W. Earp". Arizona Affairs. Archived from the original on April 23, 2009. Retrieved May 25, 2011. Originally reported in the San Francisco Examiner on May 27, 1882
archive.org
Friedman, Ralph (1978). Tracking Down Oregon (Photos by Phoebe L. Friedman ed.). Caldwell, Idaho: Caxton Printers. p. 71. ISBN978-0870042577. Retrieved December 2, 2015.
"An Interview With Virgil W. Earp". Arizona Affairs. Archived from the original on April 23, 2009. Retrieved May 24, 2011. First published in Real West Magazine in January 1982. Annotated by Robert F. Palmquist
"An Interview With Virgil W. Earp". Arizona Affairs. Archived from the original on April 23, 2009. Retrieved May 25, 2011. Originally reported in the San Francisco Examiner on May 27, 1882