World Health Organization. Guidelines for controlling and monitoring the tabacco epidemic.
Dyfyniad Arddull ChicagoWorld Health Organization. Guidelines for Controlling and Monitoring the Tabacco Epidemic.
Dyfyniad MLAWorld Health Organization. Guidelines for Controlling and Monitoring the Tabacco Epidemic.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.