Khullar, D. (2018). Indian and world geography for civil services preliminary examination. CL Media.
Citazione stile Chigago Style (17a edizione)Khullar, D.R. Indian and World Geography for Civil Services Preliminary Examination. Roorkee: CL Media, 2018.
Citatione MLA (9a ed.)Khullar, D.R. Indian and World Geography for Civil Services Preliminary Examination. CL Media, 2018.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.