„1910 United States Federal Census”. Ancestry.com. Приступљено 19. 4. 2010. Oak Park, Cook, Illinois; Roll T624_239; Page: 2B; Enumeration District: 70; Image: 703. Carl is fourth of six children of Walter A. and Julia M. Rogers.
Haggbloom, Steven J.; Warnick, Renee; Warnick, Jason E.; Jones, Vinessa K.; Yarbrough, Gary L.; Russell, Tenea M.; Borecky, Chris M.; McGahhey, Reagan; Powell, John L. (mart 2003). „'The 100 most eminent psychologists of the 20th century': Correction to Haggbloom et al (2002)”. Review of General Psychology (на језику: енглески). 7 (1): 37. doi:10.1037/1089-2680.7.1.37.