Παραπομπή APA

Kesavan, N. R. (1971). Gramavikasanam. State institute of languages.

Παραπομπή Chicago Style

Kesavan, Nair R. Gramavikasanam. Trivandrum: State institute of languages, 1971.

Παραπομπή MLA

Kesavan, Nair R. Gramavikasanam. State institute of languages, 1971.