Babbie, E. R. (1979). The practice of social research. Wadsworth.
Citación estilo ChicagoBabbie, Earl R. The Practice of Social Research. Belmont, Calif.: Wadsworth, 1979.
Cita MLABabbie, Earl R. The Practice of Social Research. Wadsworth, 1979.
Warning: These citations may not always be 100% accurate.