APA

Narayana Pillai P. K., .Vijnanaranjini (m). : T N Gopinathan Nair.

Chicago

Narayana Pillai P K, .Vijnanaranjini (m). : T N Gopinathan Nair.

Harvard

Narayana Pillai P. K., .Vijnanaranjini (m). : T N Gopinathan Nair.

MLA

Narayana Pillai P K, .: T N Gopinathan Nair. .