Dyfyniad APA

(2001). Ophthalmic drug facts 2001. Missouri: Facts and Comparisons.

Dyfyniad Arddull Chicago

Ophthalmic Drug Facts 2001. Missouri: Facts and Comparisons, 2001.

Dyfyniad MLA

Ophthalmic Drug Facts 2001. Missouri: Facts and Comparisons, 2001.

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