Babbie, E. (2004). The practice of social research. Belmont, CA: Wadsworth/Thomson Learning.
Dyfyniad Arddull ChicagoBabbie, Earl. The Practice of Social Research. Belmont, CA: Wadsworth/Thomson Learning, 2004.
Dyfyniad MLABabbie, Earl. The Practice of Social Research. Belmont, CA: Wadsworth/Thomson Learning, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.