Copeland, J. G. (1989). Civilizacion Y Cultura: Intermediate Spanish (4th ed.). Harcourt Brace Jovanovich College Publishers.
Lua i Stíl Chicago (17ú heag.)Copeland, John G. Civilizacion Y Cultura: Intermediate Spanish. 4th ed. Fort Worth: Harcourt Brace Jovanovich College Publishers, 1989.
Lua MLA (9ú heag.)Copeland, John G. Civilizacion Y Cultura: Intermediate Spanish. 4th ed. Harcourt Brace Jovanovich College Publishers, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.