एपीए उद्धरण

Gopinathan Nayar, P. R. (1980). Keralattile Vidyabhyasam. Kerala Sastra Sahitya Parishad.

शिकागो स्टाइल उद्धरण

Gopinathan Nayar, P R. Keralattile Vidyabhyasam. Trivandrum: Kerala Sastra Sahitya Parishad, 1980.

एमएलए उद्धरण

Gopinathan Nayar, P R. Keralattile Vidyabhyasam. Kerala Sastra Sahitya Parishad, 1980.