Salkind, N. J. (2010). Encyclopedia of research design. Sage.
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Dyfyniad Arddull Chicago
Salkind, Neil J. Encyclopedia of Research Design. Los Angeles: Sage, 2010.
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Dyfyniad MLA
Salkind, Neil J. Encyclopedia of Research Design. Sage, 2010.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.