Birsch, D. (2001). Ethical insights: A brief introduction (2nd ed.). Boston: McGraw Hill.
Dyfyniad Arddull ChicagoBirsch, Douglas. Ethical Insights: A Brief Introduction. 2nd ed. Boston: McGraw Hill, 2001.
Dyfyniad MLABirsch, Douglas. Ethical Insights: A Brief Introduction. 2nd ed. Boston: McGraw Hill, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.