An example of the confused spelling of Bowman's surname, as discussed later on this page, is given in a May 14, 1915 news item in the trade paperVariety, which announces "William J. Bauman" joining Metro's staff of directors. "Film Flashes", Variety (New York, N.Y.), May 14, 1915, p. 18, col. 1. Internet Archive, San Francisco, California. Retrieved October 13, 2018.
"The Second in Command", review, Variety (New York, N.Y.), July 30, 1915, p. 20, col. 2. Internet Archive. Retrieved October 12, 2018.
"Rosemary", review, Variety, December 10, 1915, p. 21, col. 2. Internet Archive. Retrieved October 14, 2018.
"Film Flashes", news item about "William J. Bauman" joining the "Horsley forces" as a new director, Variety, December 3, 1915, p. 20, col. 4. Internet Archive. Retrieved October 14, 2018.
Jessen, J. C. (1916). "In and Out of West Coast Studios", Motion Picture NewsMPN, January 29, 1916, p. 539. col. 1. Internet Archive. Retrieved January 4, 2019.
Milne, Peter (1916). "From Broadway to a Throne", review, MPN, July 22, 1916, p. 454. Retrieved October 15, 2018.
"Fifteenth Census of the United States: 1930", Oceanside Precinct, San Diego County, California, April 2, 1930; digital copy of original enumeration page. FamilySearch, census records, archives of The Church of Jesus Christ of Latter-day Saints, Salt Lake City, Utah. Retrieved October 7, 2018.
"California Death Index, 1940-1997", database of the Department of Public Health Services, Sacramento, California. FamilySearch archives. Retrieved October 7, 2018.
"William J. Bowman", Find A Grave Index, record ID 176016850, FamilySearch. Retrieved October 13, 2018.
Bowers, Q. David (1995). "Bowman, William J.", Thanhouser Films: An Encyclopedia and History, Thanhouser Company Film Preservation, Inc., Portland, Oregon. Retrieved October 9, 2018.