Cita APA

Gwatkin, D. R. 1. (1981). Signs of change in developing-country mortality trends: The end of an era? Washington, D.C.: Overseas Development Council.

Citación estilo Chicago

Gwatkin, Davidson R. 1940-. Signs of Change in Developing-country Mortality Trends: The End of an Era? Washington, D.C.: Overseas Development Council, 1981.

Cita MLA

Gwatkin, Davidson R. 1940-. Signs of Change in Developing-country Mortality Trends: The End of an Era? Washington, D.C.: Overseas Development Council, 1981.