Gaya APA

Friedman, T, L., Mandelbaum, M. (2011). That used to be us: how America fell behind in the world it invented and how we can come back . : Farrar, Straus and Giroux.

Gaya MLA

Friedman, Thomas, L.., Mandelbaum, Michael. "That used to be us: how America fell behind in the world it invented and how we can come back". : Farrar, Straus and Giroux, 2011. Buku Cetak.