Barker, S. F. (1974). The Elements of Logic (2nd ed.). McGraw-Hill.
Chicago Style (17th ed.) ZitazioaBarker, Stephen F. The Elements of Logic. 2nd ed. New York: McGraw-Hill, 1974.
MLA (9th ed.) ZitazioaBarker, Stephen F. The Elements of Logic. 2nd ed. McGraw-Hill, 1974.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.