Doby, J. T. (1967). An introduction to social research (2d ed.). Appleton Century-Crofts.
Chicago Style aipamenaDoby, J. T. An Introduction to Social Research. 2d ed. New York: Appleton Century-Crofts, 1967.
MLA aipamenaDoby, J. T. An Introduction to Social Research. 2d ed. Appleton Century-Crofts, 1967.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.