{{cite journal | last1=Usman | first1=T. | author2=G. Guo | author3=S. M. Suhail | author4=S. Ahmed | author5=L. Qiaoxiang | author6=M. S. Qureshi | author7=Y. Wang | year=2012 | title=PERFORMANCE TRAITS STUDY OF HOLSTEIN FRIESIAN CATTLE UNDER SUBTROPICAL CONDITIONS | journal=Journal of Animal and Plant Sciences | volume=22 | issue=2 | pages=92-95 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2012-JAPS-2020}}