Dyfyniad APA

Ramfjord, S. P., & Ash, M. M. (1979). Periodontology and periodontics. Saunders.

Dyfyniad Arddull Chicago

Ramfjord, Sigurd Peder, and Major M. Ash. Periodontology and Periodontics. Philadelphia: Saunders, 1979.

Dyfyniad MLA

Ramfjord, Sigurd Peder, and Major M. Ash. Periodontology and Periodontics. Saunders, 1979.

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