Nampyar, M. C. K. (1971). Vanijyattinte Prathimikatatvannal. State Institute of Languages.
Dyfyniad Arddull ChicagoNampyar, M C K. Vanijyattinte Prathimikatatvannal. Trivandrum: State Institute of Languages, 1971.
Dyfyniad MLANampyar, M C K. Vanijyattinte Prathimikatatvannal. State Institute of Languages, 1971.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.