Fromm, Erich
Harper Collins, 2000
Buku Teks
Nabila Ghassani
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2014
UI - Skripsi Membership
edited by Achi T.M.
Women Script, 2011
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May, Simon
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Buku Teks
D`arcy, M.C. (Martin Cyril)
Meridian Books, 1956
Buku Teks SO