Ramachandran Kodappally. (2007). Encyclopedia of inventions. Dronacharya Publications.
Chicago Stili AlıntıRamachandran Kodappally. Encyclopedia of Inventions. Kozhikode: Dronacharya Publications, 2007.
MLA AlıntıRamachandran Kodappally. Encyclopedia of Inventions. Dronacharya Publications, 2007.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..