Heselton, K. E. (2014). Boiler operator's handbook (Second edition.). The Fairmont Press, Inc. : CRC Press.
Lua i Stíl Chicago (17ú heag.)Heselton, Kenneth E. Boiler Operator's Handbook. Second edition. Lilburn, Georgia: The Fairmont Press, Inc. : CRC Press, 2014.
Lua MLA (9ú heag.)Heselton, Kenneth E. Boiler Operator's Handbook. Second edition. The Fairmont Press, Inc. : CRC Press, 2014.
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