Trích dẫn APA

Khullar, D. R. (2018). Physical, human and economic geography: For civil services examination. G K Publications.

Trích dẫn kiểu Chicago

Khullar, D R. Physical, Human and Economic Geography: For Civil Services Examination. New Delhi: G K Publications, 2018.

Trích dẫn MLA

Khullar, D R. Physical, Human and Economic Geography: For Civil Services Examination. G K Publications, 2018.

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