Tiles, J.E.
Moral measures: an introduction to ethics west and east
Routledge, 2000
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Irrealism in ethics
Bart Streumer.
Wiley-Blackwell , 2014
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Kagan, Shelly
Normative Ethics
Westview Press, 1997
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Franz Magnis-Suseno
Kuasa dan moral
Gramedia Pustaka Utama, 2000
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Tannsjo, Torbjorn
Understanding ethics: An Introduction to moral theory
Edinburgh University Press, 2010
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