Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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