Kagan, D., & Ozment, S. E. (1987). The Western heritage (3rd .ed.). Macmillan.
Lua i Stíl Chicago (17ú heag.)Kagan, Donald, agus Steven E. Ozment. The Western Heritage. 3rd .ed. New York: Macmillan, 1987.
Lua MLA (9ú heag.)Kagan, Donald, agus Steven E. Ozment. The Western Heritage. 3rd .ed. Macmillan, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.