(2006). National Household Education Surveys Program of 2001-05 Electronic Codebook & Public-Use Data Files. U.S. Department of Education.
Chicago-viite (17. p.)National Household Education Surveys Program of 2001-05 Electronic Codebook & Public-Use Data Files. U.S. Department of Education, 2006.
MLA-viite (9. p.)National Household Education Surveys Program of 2001-05 Electronic Codebook & Public-Use Data Files. U.S. Department of Education, 2006.
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