Παραπομπή APA

P Sethumadhavan. (2010). Stephen Hawking jeevikkunna oru ithihasam. Lipi publications.

Παραπομπή Chicago Style

P Sethumadhavan. Stephen Hawking Jeevikkunna Oru Ithihasam. Kozhikode: Lipi publications, 2010.

Παραπομπή MLA

P Sethumadhavan. Stephen Hawking Jeevikkunna Oru Ithihasam. Lipi publications, 2010.