Barrett, Askew, Fuller and Partners, Institution of Engineers, Australia, & Australian Tunnelling Association. (1982). Australasian tunnelling construction index. Australian Tunnelling Association.
Dyfyniad Arddull ChicagoBarrett, Askew, Fuller and Partners, Australia Institution of Engineers, and Australian Tunnelling Association. Australasian Tunnelling Construction Index. Barton, A.C.T.: Australian Tunnelling Association, 1982.
Dyfyniad MLABarrett, Askew, Fuller and Partners, et al. Australasian Tunnelling Construction Index. Australian Tunnelling Association, 1982.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.