Koshy Cherian. (1972). Ssya paristhithi vijnanam. State Institute of Languages.
Dyfyniad Arddull ChicagoKoshy Cherian. Ssya Paristhithi Vijnanam. Trivandrum: State Institute of Languages, 1972.
Dyfyniad MLAKoshy Cherian. Ssya Paristhithi Vijnanam. State Institute of Languages, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.