ebrary, Inc, Mahdi, K. A., Würth, A., & Lackner, H. (2007). Yemen into the twenty-first century: Continuity and change. Ithaca Press.
Lua i Stíl Chicago (17ú heag.)ebrary, Inc, Kamil A. Mahdi, Anna Würth, agus Helen Lackner. Yemen into the Twenty-first Century: Continuity and Change. Reading, UK: Ithaca Press, 2007.
Lua MLA (9ú heag.)ebrary, Inc, et al. Yemen into the Twenty-first Century: Continuity and Change. Ithaca Press, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.