Nainggolan, Hotman Saut
Business feasibility study of factory expansion of olympic group
Fakultas Eknonomi dan Bisnis Universitas Indonesia, 2009
 UI - Tesis Open
Ferrell, O.C.
Business : a changing world
McGraw-Hill, 2014
 Buku Teks
Ferrell, O.C.
Business : a changing world
Martinus Nijhoff Publishers, 2016
 Buku Teks
Monsen, R. Joseph
Business and the changing environment
McGraw-Hill, 1973
 Buku Teks SO
Velasquez, Manuel G.
Business ethics: concepts and cases
Pearson, 1998
 Buku Teks SO