Babbie, E. R. (2015). The practice of social research. Wadsworth Cengage.
Trích dẫn kiểu ChicagoBabbie, Earl R. The Practice of Social Research. Wadsworth Cengage, 2015.
MLA引文Babbie, Earl R. The Practice of Social Research. Wadsworth Cengage, 2015.
警告：這些引文格式不一定是100％准確.