Παραπομπή APA

Singh Karan Purhit, S. S. (1994). Plant productivity under environmental stress. Agro botanical publishers.

Παραπομπή Chicago Style

Singh Karan Purhit, S S. Plant Productivity Under Environmental Stress. New Delhi: Agro botanical publishers, 1994.

Παραπομπή MLA

Singh Karan Purhit, S S. Plant Productivity Under Environmental Stress. Agro botanical publishers, 1994.