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Dyfyniad Arddull ChicagoUlin, Priscilla R., Elizabeth T. Robinson, and Elizabeth E. Tolley. Qualitative Methods in Public Health: A Field Guide for Applied Research. San Francisco, CA: Jossey-Bass, 2005.
Dyfyniad MLAUlin, Priscilla R., et al. Qualitative Methods in Public Health: A Field Guide for Applied Research. Jossey-Bass, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.