Artikel Jurnal
Manullang, Sumanto G.I.
Fakultas Eknonomi dan Bisnis Universitas Indonesia, 2008
UI - Tesis Open
Coyle, Brian
Chartered Institute of Bankers, 2000
Buku Teks
Frankel, Jeffrey A.
University of California , 1991
Buku Teks
Henry Pribadi
2016
UI - Skripsi Membership