Andi Alifwansyah, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2002
UI - Tesis (Membership)
American Universities Field Staff , 1964
Buku Teks
Meyer, Robert R
Twayne's, 1966
Buku Teks
enry Holt and company, 1954
Buku Teks
MacLearly, Alistar R.
E. & F.N. Spon, 1991
Buku Teks