Cita APA

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

Citación estilo Chicago

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

Cita MLA

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