Παραπομπή APA

Pilla, G. R. (1972). Vanijyaparamaya Kattitapatukal. State Institute of language.

Παραπομπή Chicago Style

Pilla, G R. Vanijyaparamaya Kattitapatukal. Trivandrum: State Institute of language, 1972.

Παραπομπή MLA

Pilla, G R. Vanijyaparamaya Kattitapatukal. State Institute of language, 1972.