Skousen, K. F. (1987). An introduction to the SEC (4a. ed.). South-Western Publishing.
Chicago Style (17th ed.) ZitazioaSkousen, K. Fred. An Introduction to the SEC. 4a. ed. Cincinnati: South-Western Publishing, 1987.
MLA (9th ed.) ZitazioaSkousen, K. Fred. An Introduction to the SEC. 4a. ed. South-Western Publishing, 1987.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.