Shaeffer, R. E. (1988). Elementary structures for architects and builders. Prentice-Hall.
Dyfyniad Arddull ChicagoShaeffer, R. E. Elementary Structures for Architects and Builders. Englewood Cliffs, N.J: Prentice-Hall, 1988.
Dyfyniad MLAShaeffer, R. E. Elementary Structures for Architects and Builders. Prentice-Hall, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.