{{cite journal | last1=Yakubu1 | first1=A. | author2=A-R. | author3=Abdullah2 | author4=A.O. Raji | author5=S.O. Oseni | year=2020 | title=MULTIVARIATE PRINCIPAL COMPONENT ANALYSIS OF THE MORPHOMETRIC TRAITS OF SOME CATTLE BREEDS IN NIGERIA | journal=Journal of Animal and Plant Sciences | volume=31 | issue=3 | pages=681-689 | doi=10.36899/JAPS.2021.3.0258 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=AS-20-0024}}