APA
Powers T., . (1990). Marketing Hospitality. John Wiley & Sons, New York: .
Chicago
Powers Tom, . 1990. Marketing Hospitality. John Wiley & Sons, New York: .
Harvard
Powers T., . (1990). Marketing Hospitality. John Wiley & Sons, New York: .
MLA
Powers Tom, . Marketing Hospitality. John Wiley & Sons, New York: . 1990.