American Institute of Architects. The Octagon. American Institute of Architects].
Dyfyniad Arddull ChicagoAmerican Institute of Architects. The Octagon. [Washington, D.C.: American Institute of Architects].
Dyfyniad MLAAmerican Institute of Architects. The Octagon. American Institute of Architects].
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.