Hunggu Tadjuddin Usup
Universitas Indonesia, 1986
UI - Disertasi Membership
Durdje Durasid
Universitas Indonesia, 1990
UI - Disertasi Membership
Durdje Durasid
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 1990
UI - Disertasi Membership
Jeffers, Robert J.
Usaha Nasional, 1979
Buku Teks SO
Lehmann, Winfred P.
Holt, Rinehart and Winston, 1962
Buku Teks SO