Beskeen, D. W., & David W. Beskeen; Christine Foley; Elizabeth Eisner Reding. (2003). A. Boston,MA: Course Technology.
Chicago Style aipamenaBeskeen, David W., và David W. Beskeen; Christine Foley; Elizabeth Eisner Reding. A. Boston,MA: Course Technology, 2003.
MLA aipamenaBeskeen, David W., và David W. Beskeen; Christine Foley; Elizabeth Eisner Reding. A. Boston,MA: Course Technology, 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.