edited by Stella Pilling, Stephanie Kenna
Facet publishing, 2002
Buku Teks
Kotler, Philip, author
Wiley, 2012
Buku Teks
Tow, William T., author
Lynne Rienner, 1990
Buku Teks
Abdulai, Y. Seyyid, author
Austria : OPEC, 2003,
Buku Referensi
Gladys Berlyana, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia , 2020
UI - Tugas Akhir