Dyfyniad APA

Babbie, E. R. (1979). The practice of social research (2nd. ed.). Wadsworth.

Dyfyniad Arddull Chicago

Babbie, Earl R. The Practice of Social Research. 2nd. ed. Carlifornia: Wadsworth, 1979.

Dyfyniad MLA

Babbie, Earl R. The Practice of Social Research. 2nd. ed. Wadsworth, 1979.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.