Zechmeister, E. B. (1997). A practical introduction to research methods in psychology (3rd. ed.). McGraw-Hill.
Chicago Style (17th ed.) ZitazioaZechmeister, Eugene B. A Practical Introduction to Research Methods in Psychology. 3rd. ed. New York: McGraw-Hill, 1997.
MLA (9th ed.) ZitazioaZechmeister, Eugene B. A Practical Introduction to Research Methods in Psychology. 3rd. ed. McGraw-Hill, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.