Al Jamia : journal of the federation of the Universities of the Islamic world
Federation of the Univeristies of the Islamic World, 1999
 Buku Teks
Choate, Mark S., author
Professional wikis
Wiley Publishing, Inc., 2008
 Buku Teks
Asri Andara Putri, author
Praktek monopoli pengusahaan gas bumi pada kegiatan usaha hilir minyak dan gas bumi ditinjau dari hukum persaingan usaha = The natural gas business monopoly on downstream oil and gas business activities within perspective of business competition law
Fakultas Hukum Universitas Indonesia, 2019
 UI - Skripsi (Membership)
Griffin, Ricky W., author
Business
Pearson Education International, 2006
 Buku Teks
Griffin, Ricky W., author
Business
Prentice-Hall, 1993
 Buku Teks