Dyfyniad APA

Robert H.Perry, T. G. H. (1987). Building systems reference guide. McGraw-Hill.

Dyfyniad Arddull Chicago

Robert H.Perry, Tyler G Hicks. Building Systems Reference Guide. New York: McGraw-Hill, 1987.

Dyfyniad MLA

Robert H.Perry, Tyler G Hicks. Building Systems Reference Guide. McGraw-Hill, 1987.

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