APA (7th ed.) Citation

Heap, R. D. (1979). Heat pumps / (by) R.D. Heap. Spon (etc.).

Chicago Style (17th ed.) Citation

Heap, R. D. Heat Pumps / (by) R.D. Heap. London: Spon (etc.), 1979.

MLA (9th ed.) Citation

Heap, R. D. Heat Pumps / (by) R.D. Heap. Spon (etc.), 1979.

Warning: These citations may not always be 100% accurate.