[publisher not identified], [date of publication not identified]
Naskah
[publisher not identified], [date of publication not identified]
Naskah
Harris, Jonathan
Jakarta s.n. 1995,
Buku Teks
Semen Gresik, 1980
Buku Teks
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1973
UI - Skripsi Membership