Bordens, K. S., & Abbott, B. B. (2011). Research design and methods: A process approach (8th ed.). McGraw-Hill.
Dyfyniad Arddull ChicagoBordens, Kenneth S., and Bruce B. Abbott. Research Design and Methods: A Process Approach. 8th ed. New York: McGraw-Hill, 2011.
Dyfyniad MLABordens, Kenneth S., and Bruce B. Abbott. Research Design and Methods: A Process Approach. 8th ed. McGraw-Hill, 2011.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.