Cita APA (7a ed.)

Heap, R. D. (1979). Heat pumps. E & F N Spon Ltd.

Cita Chicago Style (17a ed.)

Heap, R. D. Heat Pumps. London: E & F N Spon Ltd, 1979.

Cita MLA (9a ed.)

Heap, R. D. Heat Pumps. E & F N Spon Ltd, 1979.