Waterson, A. P. (1983). Acquired immune deficiency syndrome.
Dyfyniad Arddull ChicagoWaterson, A P. Acquired Immune Deficiency Syndrome. 1983.
Dyfyniad MLAWaterson, A P. Acquired Immune Deficiency Syndrome. 1983.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.