Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.