Mumtaz Ahmad
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2019
UI - Skripsi (Membership)
SEAMIC, 1988
Buku Teks
Birnbaum, Michael H.
Prentice-Hall, 2000
Buku Teks
Mohammad Taghi Ansari
Faculty of Engineering, Universitas Indonesia, 2016
Artikel Jurnal
edited by George Zinkhan
American Marketing Association, 2000
Buku Teks