Dyfyniad APA

(1978). Concrete and Concrete Structures. American Concrete Institute.

Dyfyniad Arddull Chicago

Concrete and Concrete Structures. Detroits: American Concrete Institute, 1978.

Dyfyniad MLA

Concrete and Concrete Structures. American Concrete Institute, 1978.

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