एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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