Indrapal Singh. (1969). Adhyayan aur vichar. Vishwabharathi Prakashan.
Dyfyniad Arddull ChicagoIndrapal Singh. Adhyayan Aur Vichar. Nagpur: Vishwabharathi Prakashan, 1969.
Dyfyniad MLAIndrapal Singh. Adhyayan Aur Vichar. Vishwabharathi Prakashan, 1969.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.