APA
Hill A. G., Graham W. J., . (1988). West African sources of health and mortality information. Ottawa, Ont., Canada: International Development Research Centre.
Chicago
Hill Allan G, Graham Wendy J, . 1988. West African sources of health and mortality information. Ottawa, Ont., Canada: International Development Research Centre.
Harvard
Hill A. G., Graham W. J., . (1988). West African sources of health and mortality information. Ottawa, Ont., Canada: International Development Research Centre.
MLA
Hill Allan G, Graham Wendy J, . West African sources of health and mortality information. Ottawa, Ont., Canada: International Development Research Centre. 1988.