Herman, S. L., & Sparkman, B. L. (2014). Electricity & controls for HVAC/R (7th edition.). Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Herman, Stephen L., agus Bennie L. Sparkman. Electricity & Controls for HVAC/R. 7th edition. Stamford, CT: Cengage Learning, 2014.
Lua MLA (9ú heag.)Herman, Stephen L., agus Bennie L. Sparkman. Electricity & Controls for HVAC/R. 7th edition. Cengage Learning, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.