Dyfyniad APA

American Society of Heating, Refrigerating and Air-Conditioning Engineers. (1981). ASHRAE handbook. American Society of Heating, Refrigerating and Air-Conditioning Engineers.

Dyfyniad Arddull Chicago

American Society of Heating, Refrigerating and Air-Conditioning Engineers. ASHRAE Handbook. Atlanta, Ga.: American Society of Heating, Refrigerating and Air-Conditioning Engineers, 1981.

Dyfyniad MLA

American Society of Heating, Refrigerating and Air-Conditioning Engineers. ASHRAE Handbook. American Society of Heating, Refrigerating and Air-Conditioning Engineers, 1981.

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