Gaya APA

Whitman, B, D. (2009). Refrigeration & Air Conditioning Technology, Sixth Edition (Ed. 6). USA: Penerbit Delmar, Cengage Learning.

Gaya MLA

Whitman, Bill,, Dkk.. "Refrigeration & Air Conditioning Technology, Sixth Edition". Ed. 6 USA: Penerbit Delmar, Cengage Learning, 2009. Text.