Não informado. (1969). Journal of Leisure Research. National Recreation and Park Association.
Chicago-viite (17. p.)Não informado. Journal of Leisure Research. Washington: National Recreation and Park Association, 1969.
MLA-viite (8. p.)Não informado. Journal of Leisure Research. National Recreation and Park Association, 1969.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.