Cita APA (7a ed.)

Aston, C. C. (1984). Political hostage-taking in Western Europe. Conflict studies.

Cita Chicago Style (17a ed.)

Aston, Clive C. "Political Hostage-taking in Western Europe." Conflict Studies 1984.

Cita MLA (8a ed.)

Aston, Clive C. "Political Hostage-taking in Western Europe." Conflict Studies, 1984.