APA-referens (7:e uppl.)

LEVENHAGEN, J. I. (1999). HVAC control system design diagrams. McGraw-Hill.

Chicago-referens (17:e uppl.)

LEVENHAGEN, John I. HVAC Control System Design Diagrams. New York: McGraw-Hill, 1999.

MLA-referens (9:e uppl.)

LEVENHAGEN, John I. HVAC Control System Design Diagrams. McGraw-Hill, 1999.