APA

Vellas F., Bécherel L., . (1995). International tourism. New York: St. Martin's Press.

Chicago

Vellas François, Bécherel Lionel, . 1995. International tourism. New York: St. Martin's Press.

Harvard

Vellas F., Bécherel L., . (1995). International tourism. New York: St. Martin's Press.

MLA

Vellas François, Bécherel Lionel, . International tourism. New York: St. Martin's Press. 1995.