{{cite journal | last1=Khan | first1=A. R. | author2=H. Nawaz. | author3=I. Zahoor | year=2006 | title=EFFECT OF DIFFERENT LEVELS OF DIGESTIBLE THREONINE ON GROWTH PERFORMANCE OF BROILER CHICKS | journal=Journal of Animal and Plant Sciences | volume=16 | issue=2 | pages=NA | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2006-JAPS-208}}