Dyfyniad APA
ebrary, Inc, & Orlando, R. C. (2000). Gastroesophageal reflux disease. Dekker.
Dyfyniad Arddull Chicago
ebrary, Inc, and Roy C. Orlando. Gastroesophageal Reflux Disease. New York: Dekker, 2000.
Dyfyniad MLA
ebrary, Inc, and Roy C. Orlando. Gastroesophageal Reflux Disease. Dekker, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.