The 1940 census is on Ancestry.com and the familysearch.org website. I used familysearch.org. I've copied and pasted the exact transcription, lived in Oak Lawn, Worth township, Cook Co IL. You can view it from familysearch or Ancestry.
"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/
Head Clarence L Krueger M 42 Illinois
Wife Hazel M Krueger F 42 Illinois
Son Warren L Krueger M 18 Illinois
Daughter Carol W Krueger F 13 Illinois
Daughter Diane Krueger F 1 Illinois