Walker, D. H. (1996). Planning For Control In The Construction Industry Derek H.t Walker. Informit Electronic Publishing.
Chicago-viite (17. p.)Walker, Derek H.T. Planning For Control In The Construction Industry Derek H.t Walker. Informit Electronic Publishing, 1996.
MLA-viite (8. p.)Walker, Derek H.T. Planning For Control In The Construction Industry Derek H.t Walker. Informit Electronic Publishing, 1996.
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