एपीए उद्धरण

Freeman, C. (1974). Economic of industrial innovation. Penguin.

शिकागो स्टाइल उद्धरण

Freeman, Christopher. Economic of Industrial Innovation. Middesex: Penguin, 1974.

एमएलए उद्धरण

Freeman, Christopher. Economic of Industrial Innovation. Penguin, 1974.