Vogt, W. P. (2010). Data collection: Data collection in survey and interview research. Sage.
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Dyfyniad Arddull Chicago
Vogt, W. Paul. Data Collection: Data Collection in Survey and Interview Research. Los Angeles: Sage, 2010.
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Dyfyniad MLA
Vogt, W. Paul. Data Collection: Data Collection in Survey and Interview Research. Sage, 2010.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.