APA aipamena

John M Chalackal. (1987). Keralathile sahakarana prasthanam. State institute of languages.

Chicago Style aipamena

John M Chalackal. Keralathile Sahakarana Prasthanam. Thiruvananthapuram: State institute of languages, 1987.

MLA aipamena

John M Chalackal. Keralathile Sahakarana Prasthanam. State institute of languages, 1987.