Riska Veronika, Nila Sartika Achmadi, and Dewi Andriani, “The Implementation of Waiters And Waitresses’ Upselling Techniques At Ticket’s Cafe of Horison Ultima Makassar Hotel”, Pusaka: J. Tour. Hosp. Travel Bus. Event, vol. 2, no. 1, pp. 59–65, Jun. 2024.