Cita APA (7a ed.)

Ackerman, P. (2000). A force more powerful: A century of nonviolent... Palgrave.

Cita Chicago Style (17a ed.)

Ackerman, Peter. A Force More Powerful: A Century of Nonviolent... New York: Palgrave, 2000.

Cita MLA (9a ed.)

Ackerman, Peter. A Force More Powerful: A Century of Nonviolent... Palgrave, 2000.