Não informado. (2002). Parks & Recreation. National Recreation and Park Association.
Chicago-viite (17. p.)Não informado. Parks & Recreation. Arlington, Va: National Recreation and Park Association, 2002.
MLA-viite (8. p.)Não informado. Parks & Recreation. National Recreation and Park Association, 2002.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.