Dyfyniad APA

Organisation for Economic Co-operation and Development. (1972). Speed limits outside built-up areas.

Dyfyniad Arddull Chicago

Organisation for Economic Co-operation and Development. Speed Limits Outside Built-up Areas. [Paris, 1972.

Dyfyniad MLA

Organisation for Economic Co-operation and Development. Speed Limits Outside Built-up Areas. 1972.

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