Παραπομπή APA

Punjab Singh. (1994). Agroforestry systems for sustainable landuse. Oxford I B H publishing company.

Παραπομπή Chicago Style

Punjab Singh. Agroforestry Systems for Sustainable Landuse. New Delhi: Oxford I B H publishing company, 1994.

Παραπομπή MLA

Punjab Singh. Agroforestry Systems for Sustainable Landuse. Oxford I B H publishing company, 1994.