Erlangga Ibrahim
Gramedia Pustaka Utama, 2016
Buku Teks
Council for Research in Values and Philosophy, 2006
Buku Teks SO
Brand, Mona
Foreign Languages Publishing House, 1958.
Buku Teks
Tampubolon, Musa
Program Pascasarjana Universitas Indonesia, 2005
UI - Tesis Membership
Universitas Indonesia, 2006
UI - Skripsi Membership