McBurney, D. H. (2010). Research methods. Belmont, CA: Cengage Learning.
Dyfyniad Arddull ChicagoMcBurney, Donald H. Research Methods. Belmont, CA: Cengage Learning, 2010.
Dyfyniad MLAMcBurney, Donald H. Research Methods. Belmont, CA: Cengage Learning, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.