Heady, E. E. (1988). Agricultural production functions (1st edition.). Kalyani.
Citazione stile Chigago Style (17a edizione)Heady, Earl E. Agricultural Production Functions. 1st edition. New Delhi: Kalyani, 1988.
Citatione MLA (9a ed.)Heady, Earl E. Agricultural Production Functions. 1st edition. Kalyani, 1988.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.