Barr, Nevada
Avond Books, 2001
Buku Teks
Woskin, Rachel de
Viking, an imprint of Penguin Group (USA), 2014
Buku Teks SO
Pieper, Josef
Pantheon Books, 1955
Buku Teks SO
edited by Milton Fisk
Humanities Press, 1993
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Wang, Lv
China Renmin University Press, 2015
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