Graff, H. (1976). Irumpurukku Vyavasayam. State Institute of languages.
Čikaški stil citiranjaGraff, Heinz. Irumpurukku Vyavasayam. Trivandrum: State Institute of languages, 1976.
MLA način citiranjaGraff, Heinz. Irumpurukku Vyavasayam. State Institute of languages, 1976.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.