Ahmad, N. (1972). Muslim contribution to geography. Sh. Muhammad Ashraf.
Style de citation Chicago (17e éd.)Ahmad, Nafis. Muslim Contribution to Geography. Lahore: Sh. Muhammad Ashraf, 1972.
Style de citation MLA (9e éd.)Ahmad, Nafis. Muslim Contribution to Geography. Sh. Muhammad Ashraf, 1972.
Attention : ces citations peuvent ne pas être correctes à 100%.