Cita APA (7a ed.)

Boucek, C., & Ottaway, M. (2010). Yemen on the brink. Carnegie Endowment for International Peace.

Cita Chicago Style (17a ed.)

Boucek, Christopher, y Marina Ottaway. Yemen on the Brink. Washington, D.C.: Carnegie Endowment for International Peace, 2010.

Cita MLA (8a ed.)

Boucek, Christopher, y Marina Ottaway. Yemen on the Brink. Carnegie Endowment for International Peace, 2010.