Qurra-tul-Ain, Rabail Gul, Shagufta Yasmin , Syeda Batool Mazhar, Sadaf Zarar, . “24 Hour –Pregnancy Unique Quantification of Emesis Scale Usage to Quantify Nausea and Vomiting”. Journal of Rawalpindi Medical College, Sept. 2018, http://journalrmc.com/index.php/JRMC/article/view/933.