एपीए उद्धरण

Paramesvaran, C. (1988). Prakrti Niyamam (2nd ed.). P.K.Brothers.

शिकागो स्टाइल उद्धरण

Paramesvaran, C.R. Prakrti Niyamam. 2nd ed. Kozhikode: P.K.Brothers, 1988.

एमएलए उद्धरण

Paramesvaran, C.R. Prakrti Niyamam. 2nd ed. P.K.Brothers, 1988.