Afzal, M., & Hussain, M. (1974). The population of Pakistan. Pakistan Institute of Development Economics Islamabad.
Citazione stile Chigago Style (17a edizione)Afzal, Mohammad, e Mazhar Hussain. The Population of Pakistan. Rawalpindi: Pakistan Institute of Development Economics Islamabad, 1974.
Citatione MLA (9a ed.)Afzal, Mohammad, e Mazhar Hussain. The Population of Pakistan. Pakistan Institute of Development Economics Islamabad, 1974.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.