B. Anggia Maria R., author
Universitas Indonesia, 2006
UI - Tesis (Membership)
Tampubolon, Tulus T. H., author
Ghalia Indonesia, 2004
Buku Teks
Tambunan, Tulus, author
LP3ES, 2000
Buku Teks
FH-UNPAD
FH-UNPAD, 2006
Buku Teks
International Chamber of Commerce Indonesia
ICC Indonesia, 2014
Buku Teks