Duiker, W. J. (2015). Contemporary world history (Sixth edition.). Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Duiker, William J. Contemporary World History. Sixth edition. Stamford, Conn: Cengage Learning, 2015.
Lua MLA (9ú heag.)Duiker, William J. Contemporary World History. Sixth edition. Cengage Learning, 2015.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.