APA (7 ম সংস্করণ) উদ্ধৃতি

Khullar, D. (2018). Indian and world geography for civil services preliminary examination. CL Media.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Khullar, D.R. Indian and World Geography for Civil Services Preliminary Examination. Roorkee: CL Media, 2018.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Khullar, D.R. Indian and World Geography for Civil Services Preliminary Examination. CL Media, 2018.