Dyfyniad APA

James A Gray & Peter Ball. (1998). Infectious diseases (Second.). Churchill livingstone.

Dyfyniad Arddull Chicago

James A Gray and Peter Ball. Infectious Diseases. Second. Churchill livingstone, 1998.

Dyfyniad MLA

James A Gray and Peter Ball. Infectious Diseases. Second. Churchill livingstone, 1998.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.