Birsch, D. (2001). Ethical insights: A brief introduction. Boston: McGraw Hill.
Chicago Style aipamenaBirsch, Douglas. Ethical Insights: A Brief Introduction. Boston: McGraw Hill, 2001.
MLA aipamenaBirsch, Douglas. Ethical Insights: A Brief Introduction. Boston: McGraw Hill, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.