Gaya APA
Dharma, O., B., S. et al. (2009).
Cara cerdas optimalkan search engine (Ed.1, Cet.2).
Yogyakarta:
Explore.
Gaya MLA
Oetomo, Budi, Sutedjo, Dharma. et al.
"Cara cerdas optimalkan search engine".
Ed.1, Cet.2
Yogyakarta:
Explore,
2009.
Textbook.