Παραπομπή APA

OP Meelu. (2007). Green manuring for soil productivity improvement. Daya Publishing house.

Παραπομπή Chicago Style

OP Meelu. Green Manuring for Soil Productivity Improvement. Delhi: Daya Publishing house, 2007.

Παραπομπή MLA

OP Meelu. Green Manuring for Soil Productivity Improvement. Daya Publishing house, 2007.