Heselton, K. E. (2014). Boiler operator's handbook (Second edition.). The Fairmont Press, Inc. : CRC Press.

Heselton, Kenneth E. Boiler Operator's Handbook. Second edition. Lilburn, Georgia: The Fairmont Press, Inc. : CRC Press, 2014.

Heselton, Kenneth E. Boiler Operator's Handbook. Second edition. The Fairmont Press, Inc. : CRC Press, 2014.