{{cite journal | last1=japonica) | first1=JAPANESE QUAILS (Coturnix coturnix | author2=# | author3=# | author4=N. T. H. Nhan | author5=L. T. T. Lan | author6=N. T. K. Khang | author7=P. N. Du | author8=T. N. Dung | author9=N. T. Ngu | year=2018 | title=EFFECTS OF LAYER AGE AND EGG WEIGHT ON EGG QUALITY TRAITS OF | journal=Journal of Animal and Plant Sciences | volume=28 | issue=4 | pages=2015-2016 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2018-JAPS-403}}