Louis Leahy SJ, author
Kanisius; Gunung Mulia , 1994
Buku Teks
Naupal, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2001
UI - Laporan Penelitian
Barbour, Ian G., author
Mizan , 2005
Buku Teks SO
Lessing, Gotthold Ephraim, 1729-1781, author
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Buku Teks
Yardan, John L., author
The Council for Research in Values and Philosophy , 2001
Buku Teks