Παραπομπή APA

Verma C.L. (2013). Research in Physical Geography and Earth Science. Swastik Publications.

Παραπομπή Chicago Style

Verma C.L. Research in Physical Geography and Earth Science. New Delhi: Swastik Publications, 2013.

Παραπομπή MLA

Verma C.L. Research in Physical Geography and Earth Science. Swastik Publications, 2013.