USTA, M. (2017) «Predictors Of Relationship Quality And Relationship Outcomes In Midscale Restaurants In Izmir, Turkey», International Journal of Contemporary Economics and Administrative Sciences, 7(1-2), s. 174–205. Tilgjengelig på: http://ijceas.com/index.php/ijceas/article/view/156 (åpnet: 3juli2024).