Dyer, O. (2005). Gap in life expectancy between classes narrows, but disparity in disease-free years remains. BMJ Publishing Group Ltd.
Dyfyniad Arddull ChicagoDyer, Owen. Gap in Life Expectancy between Classes Narrows, but Disparity in Disease-free Years Remains. BMJ Publishing Group Ltd, 2005.
Dyfyniad MLADyer, Owen. Gap in Life Expectancy between Classes Narrows, but Disparity in Disease-free Years Remains. BMJ Publishing Group Ltd, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.