Volkert, Kurt; T. Jeff Williams (2001). A Cambodian Odyssey. Lincoln, NE: Writer's Showcase; iUniverse.com, Inc. p. 8. ISBN0595166067. Retrieved 16 January 2014.
Volkert, Kurt; T. Jeff Williams (2001). A Cambodian Odyssey. Lincoln, NE: Writer's Showcase; iUniverse.com, Inc. p. 9. ISBN0595166067. Retrieved 16 January 2014.