Παραπομπή APA

Atwal,A S, & Balraj singh. (1990). Pest population and assessment of crop losses. ICAR.

Παραπομπή Chicago Style

Atwal,A S, και Balraj singh. Pest Population and Assessment of Crop Losses. New Delhi: ICAR, 1990.

Παραπομπή MLA

Atwal,A S, και Balraj singh. Pest Population and Assessment of Crop Losses. ICAR, 1990.