Whyte, W.S., author
John Wiley & Sons, 2001
Buku Teks
Whiteley, David, author
McGraw-Hill, 2000
Buku Teks
edited by Francisco V. Cipolla-Ficarra
Igi Global, 2014
Buku Teks
edited by Qiongwei Ye, Baojun Ma
Emerald, 2018
eBooks
Muhammad Hassan Shibghotulloh, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2019
UI - Skripsi Membership