APA استشهاد

Unnikrishnan Puthur. (1978). Vidhichakram. SPCS.

استشهاد بنمط شيكاغو

Unnikrishnan Puthur. Vidhichakram. Kottayam: SPCS, 1978.

MLA استشهاد

Unnikrishnan Puthur. Vidhichakram. SPCS, 1978.