Dyfyniad APA

Havrella, R. (1995). Heating, ventilating, and air conditioning fundamentals ([2nd ed.].). Prentice Hall.

Dyfyniad Arddull Chicago

Havrella, Raymond. Heating, Ventilating, and Air Conditioning Fundamentals. [2nd ed.]. Englewood Cliffs, N.J: Prentice Hall, 1995.

Dyfyniad MLA

Havrella, Raymond. Heating, Ventilating, and Air Conditioning Fundamentals. [2nd ed.]. Prentice Hall, 1995.

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