Gaya APA

R, J., K.Y., T. (2008). Mechanical and electrical systems in buildings (4th.Ed.). Upper Saddle River, NJ: Pearson Education Int..

Gaya MLA

R, Janis,Richard., K.Y., Tao,William. "Mechanical and electrical systems in buildings". 4th.Ed. Upper Saddle River, NJ: Pearson Education Int., 2008. Text.