Blake, L. (1975). Civil Engineer's Reference Book. Newes- Butterworth.
शिकागो स्टाइल उद्धरणBlake, L.S. Civil Engineer's Reference Book. London: Newes- Butterworth, 1975.
एमएलए उद्धरणBlake, L.S. Civil Engineer's Reference Book. Newes- Butterworth, 1975.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.