Al-Ghazali, Abdul Hamid
Era Intermedia, 2001
Buku Teks SO
Hendra Kurniawan
Program Pascasarjana Universitas Indonesia, 2003
UI - Tesis Membership
Nurdin
Program Pascasarjana Universitas Indonesia, 2006
UI - Tesis Membership
Anwar Harjono
Gema Insani Press, 1995
Buku Teks SO
Schumacher, E.F. (Ernst Friedrich)
LP3ES, 1981
Buku Teks SO