Lyman, R. W., & Spitz, L. W. (1965). Major crises in Western civilization: The Greeks to 1660. Harcourt, Brace.
Lua i Stíl Chicago (17ú heag.)Lyman, Richard W., agus Lewis W. Spitz. Major Crises in Western Civilization: The Greeks to 1660. New York: Harcourt, Brace, 1965.
Lua MLA (9ú heag.)Lyman, Richard W., agus Lewis W. Spitz. Major Crises in Western Civilization: The Greeks to 1660. Harcourt, Brace, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.