David Robinson & Chris Garratt. (1997). Introducing Ethics: A Graphic Guide. Icon Book.
Chicago Style aipamenaDavid Robinson and Chris Garratt. Introducing Ethics: A Graphic Guide. Thriplow: Icon Book, 1997.
MLA aipamenaDavid Robinson and Chris Garratt. Introducing Ethics: A Graphic Guide. Icon Book, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.