Ahmad, N. (1972). Muslim contribution to geography. Sh. Muhammad Ashraf.
Chicagoスタイル(17版)引用形式Ahmad, Nafis. Muslim Contribution to Geography. Lahore: Sh. Muhammad Ashraf, 1972.
MLA(9版)引用形式Ahmad, Nafis. Muslim Contribution to Geography. Sh. Muhammad Ashraf, 1972.
警告: この引用は必ずしも正確ではありません.