APA
Population Reference Bureau, . (2004). Improving the Health of the World's Poorest People. : .
Chicago
Population Reference Bureau, . 2004. Improving the Health of the World's Poorest People. : .
Harvard
Population Reference Bureau, . (2004). Improving the Health of the World's Poorest People. : .
MLA
Population Reference Bureau, . Improving the Health of the World's Poorest People. : . 2004.
