Ray, J. L. (1990). Global politics (4th ed.). Houghton Mifflin Co..
Lua i Stíl Chicago (17ú heag.)Ray, James Lee. Global Politics. 4th ed. Boston: Houghton Mifflin Co., 1990.
Lua MLA (9ú heag.)Ray, James Lee. Global Politics. 4th ed. Houghton Mifflin Co., 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.