(1980). Working in the twenty-first century. Wiley.
Chicago Style (17th ed.) ZitazioaWorking in the Twenty-first Century. New York: Wiley, 1980.
MLA (9th ed.) ZitazioaWorking in the Twenty-first Century. Wiley, 1980.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.