APA Style
al, E., Beston, G. (1992).
Effectiveness of vitamin A supplementation in the control of young child morbidity and mortality in developing countries .
Toronto:
University of Toronto, Badan Litbangkes.
MLA Style
al, Et., Beston, G.H..
"Effectiveness of vitamin A supplementation in the control of young child morbidity and mortality in developing countries".
Toronto:
University of Toronto, Badan Litbangkes,
1992.
print.