City Park Facts. The Trust for Public Land, Center for City Park Excellence (June 2010). Arkivita el la originalo je 2010-12-31. Alirita 2011-01-03.
Arkivita kopio. Arkivita el la originalo je 2010-12-31. Alirita 2012-09-25. p. 25.
City Park Facts. The Trust for Public Land, Center for City Park Excellence (June 2010). Arkivita el la originalo je 2010-12-31. Alirita 2011-01-03.
Arkivita kopio. Arkivita el la originalo je 2010-12-31. Alirita 2012-09-25. p. 25.