Council for Research in Values and Philosophy, 2006
Buku Teks
Erlangga Ibrahim, author
Gramedia Pustaka Utama, 2016
Buku Teks
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2011
UI - Skripsi (Open)
Thai, Quang Trung, author
LP3ES, 1990
Buku Teks
Thanh-Luong, author
Foreign Language Publishing Haouse, 1955
Buku Teks