Nardi, P. M. (2018). Doing survey research: A guide to quantitative methods (Fourth edition.). Routledge.
Lua i Stíl Chicago (17ú heag.)Nardi, Peter M. Doing Survey Research: A Guide to Quantitative Methods. Fourth edition. New York: Routledge, 2018.
Lua MLA (8ú heag.)Nardi, Peter M. Doing Survey Research: A Guide to Quantitative Methods. Fourth edition. Routledge, 2018.
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