Serrat, Josep Maria Bech
Selling tourism services at a distance: an analysis of the EU consumer acquis
Springer, 2012
 eBooks
Hoffman, K. Douglas
Services marketing: concepts, strategies, and​ cases
Cengage Learning, 2017
 Buku Teks SO
Hoffamn, K. Douglas
Essentials of services marketing : concepts, strategies, and cases
Horcourt Colledge Publisher, 2002
 Buku Teks SO
Sanders, Ethan S.
Performance intervention maps: 39 strategies for solving your organization's problems
American Society for Training & Development, 2001
 eBooks
Budhi Sholeh Wibowo
A taxonomy of strategies for industry 4.0 implementation in Indonesia
Pusat Penelitian dan Pengabdian Pada Masyarakat (P3M) STTA, 2019
 Artikel Jurnal