Unknown. (2023). Report of the Forest Authority for Ceylon Prepared for the British Empire Forestry Conference, Ottawa, Canada, 1923. Forest Research Institute.
Chicago-referens (17:e uppl.)Unknown. Report of the Forest Authority for Ceylon Prepared for the British Empire Forestry Conference, Ottawa, Canada, 1923. Forest Research Institute, 2023.
MLA-referens (9:e uppl.)Unknown. Report of the Forest Authority for Ceylon Prepared for the British Empire Forestry Conference, Ottawa, Canada, 1923. Forest Research Institute, 2023.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.