Anderson, Owen J.
The natural moral law : the good after modernity
Cambridge University Press, 2012
 Buku Teks SO
Garland, Henry
The Oxford companion to German literature
Oxford University Press, 1995
 Buku Referensi
Tilley, Christopher Y.
Material culture and text: the art of ambiguity/Christopher Tilley
London Routledge 1991,
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Bosacki, Sandra Leanne
Culture of ambiguity: implications for self and social understanding in adolescence
Sense, 2012
 eBooks
Weston, Michael
Philosophy, literature and the human good
Routledge , 2001
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