{{cite journal | last1=Habib | first1=G. | author2=A. Hameed | author3=M. Saleem | year=2019 | title=EFFECT OF DIETARY LEVELS OF PROTEIN ON MILK PRODUCTION, MILK-UREA AND NITROGEN USE EFFECIENCY IN PERI-URBAN MILKING BUFFALOES | journal=Journal of Animal and Plant Sciences | volume=29 | issue=6 | pages=1558-1567 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2019-JAPS-606}}