Ahmad, Q. S. (1963). Major natural regions: (a treatment of the world on the basis of natural regions). Chand.
Citazione stile Chigago Style (17a edizione)Ahmad, Qazi Saied-Ud-Din. Major Natural Regions: (a Treatment of the World on the Basis of Natural Regions). Delhi [u.a.]: Chand, 1963.
Citatione MLA (9a ed.)Ahmad, Qazi Saied-Ud-Din. Major Natural Regions: (a Treatment of the World on the Basis of Natural Regions). Chand, 1963.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.