APA (7th ed.) Citation

Coombe, R. A. (1968). An introduction to direct energy conversion / by R.A. Coombe. Pitman.

Chicago Style (17th ed.) Citation

Coombe, R. A. An Introduction to Direct Energy Conversion / by R.A. Coombe. Pitman, 1968.

MLA (9th ed.) Citation

Coombe, R. A. An Introduction to Direct Energy Conversion / by R.A. Coombe. Pitman, 1968.

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