{{cite journal | last1=Usman | first1=M. | author2=I. Kazmi | author3=T. Khaliq | author4=A. Ahmad | author5=M. F. Saleem | author6=A. Shabbir | year=2012 | title=VARIABILITY IN WATER USE, CROP WATER PRODUCTIVITY AND PROFITABILITY OF RICE AND WHEAT IN RECHNA DOAB, PUNJAB, PAKISTAN | journal=Journal of Animal and Plant Sciences | volume=22 | issue=4 | pages=998-1003 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2012-JAPS-430}}