World health organization. (2008). Anti-tuberculosis drug resistance in the world: Fourth global report. WHO.
Dyfyniad Arddull ChicagoWorld health organization. Anti-tuberculosis Drug Resistance in the World: Fourth Global Report. Geneva: WHO, 2008.
Dyfyniad MLAWorld health organization. Anti-tuberculosis Drug Resistance in the World: Fourth Global Report. WHO, 2008.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.