Dyfyniad APA

Covington, G. A. (1997). Access By Design George A. Covington, Bruce Hannah. Van Nostrand Reinhold.

Dyfyniad Arddull Chicago

Covington, George A. Access By Design George A. Covington, Bruce Hannah. Van Nostrand Reinhold, 1997.

Dyfyniad MLA

Covington, George A. Access By Design George A. Covington, Bruce Hannah. Van Nostrand Reinhold, 1997.

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