Cita APA (7a ed.)

National Recreation and Park Association, Keller, M. J., & Osgood, N. J. (1987). Dinamic leisure programming with older adults. National Recreation and Park Association.

Cita Chicago Style (17a ed.)

National Recreation and Park Association, M. Jean Keller, y Nancy J. Osgood. Dinamic Leisure Programming with Older Adults. Arlington, Virginia: National Recreation and Park Association, 1987.

Cita MLA (9a ed.)

National Recreation and Park Association, et al. Dinamic Leisure Programming with Older Adults. National Recreation and Park Association, 1987.