Levitt, Theodore
McGraw-Hill, 1962
Buku Teks SO
Routledge, 2021
eBooks
edited by Elias G. Carayannis, Urmas Varblane and Tonu Roolaht
Springer, 2012
eBooks
Kotler, Philip
Harvard Business School Press, 2002
Buku Teks SO
Solikin M. Juhro
Bank Indonesia Insitute, 2019
Artikel Jurnal