{{cite journal | last1=Rafeeq | first1=M. | author2=T. N. Pasha | author3=N. Rashid | author4=B. Hilal | author5=I. Shahzad | year=2011 | title=EFFECT OF SUPPLEMENTATION OF METHIONINE, BETAINE AND CHOLINE ON THE PERFORMANCE OF BROILER CHICKEN IN EARLY LIFE FED METHIONINE DEFICIENT RATION | journal=Journal of Animal and Plant Sciences | volume=21 | issue=4 | pages=778-780 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2011-JAPS-417}}