Kupka, I. (2006). Recreational load as a driving variable for urban forests. Czech Academy of Agricultural Sciences.
Chicago-referens (17:e uppl.)Kupka, I. Recreational Load as a Driving Variable for Urban Forests. Czech Academy of Agricultural Sciences, 2006.
MLA-referens (9:e uppl.)Kupka, I. Recreational Load as a Driving Variable for Urban Forests. Czech Academy of Agricultural Sciences, 2006.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.