Não informado. Population Reports. George Washington University, Department of Medical and Public Affairs.
Citação do estilo Chicago (17ª ed.)Não informado. Population Reports. Washington: George Washington University, Department of Medical and Public Affairs.
Citação MLA (8ª ed.)Não informado. Population Reports. George Washington University, Department of Medical and Public Affairs.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.