APA Alıntı

Butler,Richard W, & Boyd,Stephen W. (2000). Tourism and national parks: Issues and implications. John Wiley.

Chicago Stili Alıntı

Butler,Richard W, ve Boyd,Stephen W. Tourism and National Parks: Issues and Implications. Chichester: John Wiley, 2000.

MLA Alıntı

Butler,Richard W, ve Boyd,Stephen W. Tourism and National Parks: Issues and Implications. John Wiley, 2000.