Selvam S.K. Distance Education For National Development. APH Publishing.
Citazione stile Chigago Style (17a edizione)Selvam S.K. Distance Education For National Development. New Delhi: APH Publishing.
Citatione MLA (9a ed.)Selvam S.K. Distance Education For National Development. APH Publishing.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.