Gup, Benton E., author
Richard D. Irwin, 1996
Buku Referensi
Yasmin Ridwan Putri, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2021
UI - Tesis (Membership)
Universitas Indonesia, 2011
UI - Skripsi (Open)
Kennedy, Walter, author
Bankers Publishing Company , 1958
Buku Teks
Koch, Timothy W., author
The Dryden Press, 2000
Buku Teks