Gaya APA

Schaffer, M, E. (2005). A Practical Guide to Noise and Vibration Control for Hvac Systems . USA: American Society of Heating, Refrigerating and Air condtioning Egineers,Inc.

Gaya MLA

Schaffer, Mark, E.. "A Practical Guide to Noise and Vibration Control for Hvac Systems". USA: American Society of Heating, Refrigerating and Air condtioning Egineers,Inc, 2005. Text.