APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Butler Richard W. and Boyd Stephen W. Tourism and National Parks: Issues Nad Implications. New York: John Wiley & Sons, 2000.

MLA (9th ed.) Citation

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