Cita APA (7a ed.)

Kelly, J. R., & Freysinger, V. J. (2000). 21st century leisure: Current issues. Allyn and Bacon.

Cita Chicago Style (17a ed.)

Kelly, John R., y Valeria J. Freysinger. 21st Century Leisure: Current Issues. Boston [etc.]: Allyn and Bacon, 2000.

Cita MLA (9a ed.)

Kelly, John R., y Valeria J. Freysinger. 21st Century Leisure: Current Issues. Allyn and Bacon, 2000.