| Sources |
- [S1790] Social Security Administration, Social Security Applications and Claims Index, 1936-2007, (Ancestry.com (http://www.ancestry.com : 2015)), entry for John Robert Hook, 2004, SS no. 549-54-0139, accessed 7 Jan 2020 (Reliability: 3).
- [S1538] Washington State Department of Health, Washington Death Index, 1940-2014, ((http://www.ancestry.com : 2002)), accessed 7 Jan 2020), John R. Hook. 2004, King County. (Reliability: 3).
- [S2071] California Department of Public Health, California, County Birth, Marriage, and Death Records, 1849-1980, ((http://www.ancestry.com : 2017)), accessed 7 Jan 2020), Hook-McCoy, 1930, Santa Ana County. (Reliability: 3).
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