Walker, D. H. (1996). Planning For Control In The Construction Industry Derek H.t Walker. Informit Electronic Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWalker, Derek H.T. Planning For Control In The Construction Industry Derek H.t Walker. Informit Electronic Publishing, 1996.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWalker, Derek H.T. Planning For Control In The Construction Industry Derek H.t Walker. Informit Electronic Publishing, 1996.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.