Ray, G. F. (1979). The Innovation Process in the Energy Industries. Oxford: Cambridge University Press.
शिकागो स्टाइल उद्धरणRay, G. F. The Innovation Process in the Energy Industries. Oxford: Cambridge University Press, 1979.
एमएलए उद्धरणRay, G. F. The Innovation Process in the Energy Industries. Oxford: Cambridge University Press, 1979.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.