Dyfyniad APA

American Concrete Institute. (1989). ACI manual of concrete practice. American Concrete Institute.

Dyfyniad Arddull Chicago

American Concrete Institute. ACI Manual of Concrete Practice. Detroit, Mich: American Concrete Institute, 1989.

Dyfyniad MLA

American Concrete Institute. ACI Manual of Concrete Practice. American Concrete Institute, 1989.

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