APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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