Umar Farooq, Muhammad Hanif Akhtar,Muhammad Ramzan Sheikh,Asifa Tufail. “SOCIO-ECONOMIC FACTORS OF CHILDHOOD IMMUNIZATION IN PAKISTAN”. Harf-O-Sukhan, Vol. 5, no. 2, Sept. 2021, pp. 8-26, https://www.harf-o-sukhan.com/index.php/Harf-o-sukhan/article/view/72.