Carter, Gary W.
Wiley-Blackwell, 2009
Buku Teks
Tracy, Brian
American Management Association, 2005
eBooks
Tay, Ronald
Marshall Cavendish, 2014
Buku Teks
Tobin, Daniel R., 1946-
McGraw-Hill, 2012
Buku Teks
Nguyen, Tuan Duong
Buiness School Universitas Pelita Harapan, 2018
Artikel Jurnal