Ramachandran Kodappally. (2007). Encyclopedia of inventions. Dronacharya Publications.
Chicago-stil citatRamachandran Kodappally. Encyclopedia of Inventions. Kozhikode: Dronacharya Publications, 2007.
MLA-referensRamachandran Kodappally. Encyclopedia of Inventions. Dronacharya Publications, 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.