Balagopal,B. (1991). Anweshanathinte aarambham. Prabhath, Thiruvananthapuram.
Dyfyniad Arddull ChicagoBalagopal,B. Anweshanathinte Aarambham. Prabhath, Thiruvananthapuram: Prabhath, Thiruvananthapuram, 1991.
Dyfyniad MLABalagopal,B. Anweshanathinte Aarambham. Prabhath, Thiruvananthapuram, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.