APA (7th ed.) Citation

Kelly, J. R., & Warnick, R. B. (1999). Recreation trends and markets: The 21st century. Sagamore Publishing.

Chicago Style (17th ed.) Citation

Kelly, John R., and Rodney B. Warnick. Recreation Trends and Markets: The 21st Century. Champaign, Ill.: Sagamore Publishing, 1999.

MLA (9th ed.) Citation

Kelly, John R., and Rodney B. Warnick. Recreation Trends and Markets: The 21st Century. Sagamore Publishing, 1999.