Baruss, Imants
Purdue Univ.Press , 1996
Buku Teks
Collins, John Edward
Rowman & Littlefield, 1991
Buku Teks
Wojciechowski, Jerzy A.
Council for research in values and philosophy, [Date of publication not identified]
Buku Teks SO
Julizar Firmansyah
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2003
UI - Tesis Membership
Embun Kenyowati Ekosiwi
Universitas Indonesia, 2003
UI - Tesis Membership