مقالة · مجلة · 2013
Maxwell Ayindenaba Dalaba, Patricia Akweongo, Germain Savadogo, Happiness Saronga, John E. Williams, Rainer Sauerborn و2 آخرون
BMC Health Services Research
اقرأه10.1186/1472-6963-13-287
كما طُبع: John Williams
كما طُبع: Svetla Loukanova