Dyfyniad APA

Ray, G. F. (1979). The Innovation Process in the Energy Industries. Oxford: Cambridge University Press.

Dyfyniad Arddull Chicago

Ray, G. F. The Innovation Process in the Energy Industries. Oxford: Cambridge University Press, 1979.

Dyfyniad MLA

Ray, G. F. The Innovation Process in the Energy Industries. Oxford: Cambridge University Press, 1979.

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