Haryo Adityo, author
Universitas Indonesia, 2008
UI - Skripsi (Open)
Universitas Indonesia, 2003
UI - Skripsi (Membership)
Pieper, Ursula, author
Tubingen Gunter Narr Verlag 1979
Buku Teks
Goode, William J., author
Usaha Nasional, 1951
Buku Teks
Buku Teks