Birsch, D. (2002). Ethical insights: A brief introduction (2nd ed.). Boston: McGraw Hill.
Trích dẫn kiểu ChicagoBirsch, Douglas. Ethical Insights: A Brief Introduction. 2nd ed. Boston: McGraw Hill, 2002.
Deismireacht MLABirsch, Douglas. Ethical Insights: A Brief Introduction. 2nd ed. Boston: McGraw Hill, 2002.
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