Janiak, Małgorzata, and Monika Kozłowska-Adamczak. “Evaluation of the Most Popular Accommodation Booking Portals With Regard to Consumer and Academic Usability”. Turyzm/Tourism 28, no. 2 (December 30, 2018): 93–100. Accessed May 6, 2024. https://czasopisma.uni.lodz.pl/tourism/article/view/5011.