Cita APA (7a ed.)

Shearman, P., & Sussex, M. (2004). European security after 9/11. Ashgate.

Cita Chicago Style (17a ed.)

Shearman, Peter, y Matthew Sussex. European Security After 9/11. Aldershot [u.a.]: Ashgate, 2004.

Cita MLA (8a ed.)

Shearman, Peter, y Matthew Sussex. European Security After 9/11. Ashgate, 2004.