{{cite journal | last1=Khan | first1=S. U. | author2=T. H. Flower | author3=Q. U. Khan | author4=A. A. Khakwanı | author5=O. U. Sayal | author6=I. Bakhsh | year=2018 | title=COMPARISON OF SUITABLE EXTRACTANTS USED IN SOIL PHOSPHORUS TESTING ON DIFFERENT SOILS | journal=Journal of Animal and Plant Sciences | volume=28 | issue=1 | pages=113-118 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2018-JAPS-16}}