Howell, D. (2015). Social science survey data sets in the public domain: Access, quality, and importance. University of the Philippines Center for Integrative and Development Studies.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিHowell, David. Social Science Survey Data Sets in the Public Domain: Access, Quality, and Importance. Quezon City: University of the Philippines Center for Integrative and Development Studies, 2015.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিHowell, David. Social Science Survey Data Sets in the Public Domain: Access, Quality, and Importance. University of the Philippines Center for Integrative and Development Studies, 2015.
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