Bourne, R. (2023). Nilambur Valley Working plan Volume I Description History and Statistics. 1917-1918. The Superintendent Government Press, Kerala.
Chicago-referens (17:e uppl.)Bourne, R. Nilambur Valley Working Plan Volume I Description History and Statistics. 1917-1918. The Superintendent Government Press, Kerala, 2023.
MLA-referens (9:e uppl.)Bourne, R. Nilambur Valley Working Plan Volume I Description History and Statistics. 1917-1918. The Superintendent Government Press, Kerala, 2023.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.