Walker, D. H. (1996). Planning For Control In The Construction Industry Derek H.t Walker. Informit Electronic Publishing.
Chicago-referens (17:e uppl.)Walker, Derek H.T. Planning For Control In The Construction Industry Derek H.t Walker. Informit Electronic Publishing, 1996.
MLA-referens (8:e uppl.)Walker, Derek H.T. Planning For Control In The Construction Industry Derek H.t Walker. Informit Electronic Publishing, 1996.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.