{{cite journal | last1=Hussain | first1=S. | author2=A. Ali | author3=M. Ibrahim | author4=M. F. Saleem | author5=M. A. alias Haji A. Bukhsh | year=2012 | title=EXOGENOUS APPLICATION OF ABSCISIC ACID FOR DROUGHT TOLERANCE IN SUNFLOWER (HELIANTHUS ANNUUS L.): A REVIEW | journal=Journal of Animal and Plant Sciences | volume=22 | issue=3 | pages=806-826 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2012-JAPS-349}}