[publisher not identified], [date of publication not identified]
Naskah
Jonge, Huub de, 1946-
Wolters Noordhoff NV. Groningen, 1963
Buku Teks
Harris, Jonathan
Jakarta s.n. 1995,
Buku Teks
Semen Gresik, 1980
Buku Teks
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1973
UI - Skripsi (Membership)