एपीए उद्धरण

R Gupta's joint CSIR - UGC NET mathematical science. Ramesh pub house.

शिकागो स्टाइल उद्धरण

R Gupta's Joint CSIR - UGC NET Mathematical Science. New Delhi: Ramesh pub house.

एमएलए उद्धरण

R Gupta's Joint CSIR - UGC NET Mathematical Science. Ramesh pub house.