Gaya APA

Levitt, S, D. et al (2006). Freakonomics : Ekonom "Nyeleneh" Membongkar Sisi Tersembunyi Segala Hal = Freakonomics : A Rogue Economist Explores The Hidden Side Of Everything . Jakarta: Gramedia Pustaka Utama.

Gaya MLA

Levitt, Steven, D.. et al. "Freakonomics : Ekonom "Nyeleneh" Membongkar Sisi Tersembunyi Segala Hal = Freakonomics : A Rogue Economist Explores The Hidden Side Of Everything". Jakarta: Gramedia Pustaka Utama, 2006. Text.