Gaya APA

Dharma, B, S., Christie, J, H, E. (2009). Cara Cerdas Optimalkan Search Engine . yogyakarta: Explore.

Gaya MLA

Dharma, Budi, Sutedjo., Christie, Jessica., Hartono,, Eddy. "Cara Cerdas Optimalkan Search Engine". yogyakarta: Explore, 2009. Text.