John M Chalackal. (1987). Keralathile sahakarana prasthanam. State institute of languages.
Čikaški stil citiranjaJohn M Chalackal. Keralathile Sahakarana Prasthanam. Thiruvananthapuram: State institute of languages, 1987.
MLA način citiranjaJohn M Chalackal. Keralathile Sahakarana Prasthanam. State institute of languages, 1987.
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