"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MGQ1-JMJ : accessed 1 October 2022), Noah D Zook in household of Joel Zook, Leacock, Lancaster, Pennsylvania, United States; citing enumeration district (ED) ED 100, sheet 13A, family 185, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1355; FHL microfilm 1,375,368.
"United States Census, 1930," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:XHQ3-QQ8 : accessed 1 October 2022), Noah D Zook, East Lampeter, Lancaster, Pennsylvania, United States; citing enumeration district (ED) ED 35, sheet 3A, line 32, family 61, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 2056; FHL microfilm 2,341,790.
"United States Census, 1940," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:KQQ1-GQS : 7 January 2021), Noah D Zook, East Lampeter Township, Lancaster, Pennsylvania, United States; citing enumeration district (ED) 36-36, sheet 9B, line 51, family 174, 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 3529.