↑ "New York State Census, 1925," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:KSSJ-2BH : 8 November 2014), Perry J Cook, Brooklyn, A.D. 01, E.D. 32, Kings, New York, United States; records extracted by Ancestry and images digitized by FamilySearch; citing p. 23, line 34, New York State Archives, Albany. 1925 New York Bethel
↑ "United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:V3J7-8P2 : 10 January 2021), Perry J Cook, 07 Feb 1995; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M2ZH-YBH : accessed 9 October 2021), Perry J Cook in household of Henry S Cook, Randolph, Riley, Kansas, United States; citing enumeration district (ED) ED 114, sheet 1B, family 19, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 454; FHL microfilm 1,374,467.
"Kansas State Census, 1915," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QGDP-6MRF : 12 October 2019), Perry Cook in household of H L Cook, Randolph, Riley, Kansas, United States; citing Randolph, Riley, Kansas, United States, 115, 22, Kansas Historical Society, Topeka.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X77Q-W35 : accessed 9 October 2021), Perry J Cook in household of Henry S Cook, Jackson, Riley, Kansas, United States; citing enumeration district (ED) ED 8, sheet 3A, line 31, family 63, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 718; FHL microfilm 2,340,453.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VR2F-LTX : 30 May 2020), Perry J Cook, Ward 2, Caldwell, Caldwell City, Sumner, Kansas, United States; citing enumeration district (ED) 96-5B, sheet 9B, line 42, family 201, 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 1263.
Find a Grave, database and images (https://www.findagrave.com/ : accessed 9 October 2021), memorial page for Perry Jay Cook (1905–1995), Find A Grave: Memorial #158959645, citing Forest Park Cemetery, Anthony, Harper County, Kansas, USA ; Maintained by Beckie (Carter) Williams (contributor 46990712).
"United States, GenealogyBank Obituaries, 1980-2014," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QKPX-KNVK : accessed 9 October 2021), Perry Jay Cook in entry for Louis Vern Or L V Cook, Oklahoma, United States, 21 Oct 2013; from "Recent Newspaper Obituaries (1977 - Today)," database, GenealogyBank.com (http://www.genealogybank.com : 2014); citing Enid News and Eagle, born-digital text.