Cita APA (7a ed.)

Hardt, M., & Negri, A. (2000). Empire. Harvard University.

Cita Chicago Style (17a ed.)

Hardt, Michael, y Antonio Negri. Empire. Cambridge: Harvard University, 2000.

Cita MLA (9a ed.)

Hardt, Michael, y Antonio Negri. Empire. Harvard University, 2000.