APA استشهاد

Graff, H. (1976). Irumpurukku Vyavasayam. State Institute of languages.

استشهاد بنمط شيكاغو

Graff, Heinz. Irumpurukku Vyavasayam. Trivandrum: State Institute of languages, 1976.

MLA استشهاد

Graff, Heinz. Irumpurukku Vyavasayam. State Institute of languages, 1976.