Schiffman, Leon G., author
Prentice-Hall, 1997
Buku Teks
Schiffman, Leon G., author
Pearson, 2015
Buku Teks
edited by Russell W. Belk
Emerald, 2017
eBooks
Ryandra Arya Kharisma, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2013
UI - Skripsi (Membership)
Cut Nisa Amalia Sofyan, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2013
UI - Skripsi (Membership)