1. Blokdyk: Marketing Applications A Complete Guide - 2019 Edition. London: 5starcooks, 2019. ISBN 0655816607 .
2. Kotler, Keller, Goodman, Brady, Hansen: Marketing Management (4th European Edition). New York: Pearson Education Limited, 2019. ISBN 1292248440 .
3. Wirtz,Lovelock: Services Marketing: People, Technology, Strategy (Eighth Edition). New York: World Scientific Publishing, 2016. ISBN 9781944659011 .