Gaya APA

Velte, T, J. et al (c2008). Green IT: reduce your information system's environmental impact while adding to the bottom line . nyu: McGraw-Hill.

Gaya MLA

Velte, Toby, J.. et al. "Green IT: reduce your information system's environmental impact while adding to the bottom line". nyu: McGraw-Hill, c2008. Buku.