APA

Powers T. F., . (1979). Introduction to managemet hospitality industry. New York: John Wiley & Sons.

Chicago

Powers Thomas F, . 1979. Introduction to managemet hospitality industry. New York: John Wiley & Sons.

Harvard

Powers T. F., . (1979). Introduction to managemet hospitality industry. New York: John Wiley & Sons.

MLA

Powers Thomas F, . Introduction to managemet hospitality industry. New York: John Wiley & Sons. 1979.