Shenkel, William M.
Business Publications , 1980
Buku Teks
editor, Joseph L. Pagliari
Irwin, 1996
Buku Referensi
Mosalina Dewi
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1996
UI - Tesis Membership
Ario Pramadhi
2001
UI - Tesis Membership
Shilling, James D.
South-Western, 2002
Buku Teks