Ribbentrop, B. (2023). Progress report of forest administration in the Punjab for the year 1883-84. Forest Research Institute.
Chicago-referens (17:e uppl.)Ribbentrop, B. Progress Report of Forest Administration in the Punjab for the Year 1883-84. Forest Research Institute, 2023.
MLA-referens (9:e uppl.)Ribbentrop, B. Progress Report of Forest Administration in the Punjab for the Year 1883-84. Forest Research Institute, 2023.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.