Gaya APA

cetron, M. et al (2006). Hospitality 2010 Jhe Future of Hospitality and Jravel . united states of america: Pearson Prentice Hall.

Gaya MLA

cetron, Marvin. et al. "Hospitality 2010 Jhe Future of Hospitality and Jravel". united states of america: Pearson Prentice Hall, 2006. Text.