एपीए उद्धरण

(1971). The economics of technological change: Selected readings. Harmondsworth: Penguin.

शिकागो स्टाइल उद्धरण

The Economics of Technological Change: Selected Readings. Harmondsworth: Penguin, 1971.

एमएलए उद्धरण

The Economics of Technological Change: Selected Readings. Harmondsworth: Penguin, 1971.