"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MN1H-4PY : accessed 29 December 2018), William G Banks in household of William G Banks, Mounds, Creek, Oklahoma, United States; citing ED 31, sheet 10A, line 46, family 233, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1459; FHL microfilm 1,821,459.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VBKT-S6D : 14 March 2018), W G Banks in household of W G Banks, Glenpool Township, Tulsa, Oklahoma, United States; citing enumeration district (ED) 72-17, sheet 10B, line 43, family 182, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 3336.
Find A Grave, database and images (https://www.findagrave.com : accessed 29 December 2018), memorial page for William Garrett Banks, Jr (1918–1950), Find A Grave: Memorial #160643566, citing Rose Hill Memorial Park, Tulsa, Tulsa County, Oklahoma, USA ; Maintained by Cherokee Rose (contributor 47860919) .