Ahmad, N. (1972). Muslim contribution to geography. Sh. Muhammad Ashraf.
Čikaški stil citiranja (17. izdanje)Ahmad, Nafis. Muslim Contribution to Geography. Lahore: Sh. Muhammad Ashraf, 1972.
MLA način citiranja (9. izdanje)Ahmad, Nafis. Muslim Contribution to Geography. Sh. Muhammad Ashraf, 1972.
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