Twitchell, K. S., & Jurji, E. J. (1953). Saudi Arabia: With an account of the development of its natural resources ([2nd ed.].). Princeton University Press.
Lua i Stíl Chicago (17ú heag.)Twitchell, Karl Saben, agus Edward Jabra Jurji. Saudi Arabia: With an Account of the Development of Its Natural Resources. [2nd ed.]. Princeton: Princeton University Press, 1953.
Lua MLA (9ú heag.)Twitchell, Karl Saben, agus Edward Jabra Jurji. Saudi Arabia: With an Account of the Development of Its Natural Resources. [2nd ed.]. Princeton University Press, 1953.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.