APA (7th ed.) Citation

Levenhagen, J. I., & Spethmann, D. H. (1993). HVAC controls and systems. McGraw-Hill.

Chicago Style (17th ed.) Citation

Levenhagen, John I., and Donald H. Spethmann. HVAC Controls and Systems. New York: McGraw-Hill, 1993.

MLA (9th ed.) Citation

Levenhagen, John I., and Donald H. Spethmann. HVAC Controls and Systems. McGraw-Hill, 1993.