Cita APA (7th ed.)

Herman, S. L., & Sparkman, B. L. (2010). Electricity & controls for HVAC/R (6th ed.). Delmar Cengage Learning.

Cita Chicago (17th ed.)

Herman, Stephen L., i Bennie L. Sparkman. Electricity & Controls for HVAC/R. 6th ed. Clifton Park, N.Y: Delmar Cengage Learning, 2010.

Cita MLA (9th ed.)

Herman, Stephen L., i Bennie L. Sparkman. Electricity & Controls for HVAC/R. 6th ed. Delmar Cengage Learning, 2010.