Pearce, D. G. (1987). Tourism today: A geographical analysis. Longman Scientific & Technical ; Wiley.
Lua i Stíl Chicago (17ú heag.)Pearce, Douglas G. Tourism Today: A Geographical Analysis. London : New York: Longman Scientific & Technical ; Wiley, 1987.
Lua MLA (9ú heag.)Pearce, Douglas G. Tourism Today: A Geographical Analysis. Longman Scientific & Technical ; Wiley, 1987.