Dyfyniad APA

(1977). Guidelines for evaluating the seismic resistance of existing buildings / by John M. Lybas.

Dyfyniad Arddull Chicago

Guidelines for Evaluating the Seismic Resistance of Existing Buildings / by John M. Lybas. 1977.

Dyfyniad MLA

Guidelines for Evaluating the Seismic Resistance of Existing Buildings / by John M. Lybas. 1977.

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