WILLEMS, N. (1978). Structural Analysis For Engineers. McGraw-Hill.
Dyfyniad Arddull ChicagoWILLEMS, Nicholas. Structural Analysis For Engineers. McGraw-Hill, 1978.
Dyfyniad MLAWILLEMS, Nicholas. Structural Analysis For Engineers. McGraw-Hill, 1978.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.