Dyfyniad APA

Tufts University Health & Nutrition Letter. Tufts University Health & Nutrition Letter.

Dyfyniad Arddull Chicago

Tufts University Health & Nutrition Letter. Tufts University Health & Nutrition Letter.

Dyfyniad MLA

Tufts University Health & Nutrition Letter. Tufts University Health & Nutrition Letter.

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