{{cite journal | last1=Khan | first1=B. N. | year=2013 | title=IMPACT OF CAPTIVITY ON SOCIAL BAHAVIOUR OF CHIMPANZEE (PAN TROGLODYTES) | journal=Journal of Animal and Plant Sciences | volume=23 | issue=3 | pages=779-785 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2013-JAPS-317}}