Education lost reflections on contemporary pedagogical practice
Kritik atas konsep moralitas : falsafah akhlak
History of philosophy : from the post Kantian idealists to Narse, Kierkegaard, and Neitzsche
My philosophical development
Mencari Allah : Pengantar kedalam filsafat keTuhanan
Etika dasar : Masalah-masalah pokok filsafat moral
Alam pikiran