APA aipamena

Varma C R R. (1998). Prakrithijeevanam: Life natural (4.). State institute of languages.

Chicago Style aipamena

Varma C R R. Prakrithijeevanam: Life Natural. 4. Thiruvananthapuram: State institute of languages, 1998.

MLA aipamena

Varma C R R. Prakrithijeevanam: Life Natural. 4. State institute of languages, 1998.