Dyfyniad APA

(1997). Merck manual of medical information. Merck research laboratories.

Dyfyniad Arddull Chicago

Merck Manual of Medical Information. New Jersey: Merck research laboratories, 1997.

Dyfyniad MLA

Merck Manual of Medical Information. Merck research laboratories, 1997.

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