Bentley, J. H., & Ziegler, H. F. (2009). Traditions and encounters: A global perspective on the past (4th ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Bentley, Jerry H., agus Herbert F. Ziegler. Traditions and Encounters: A Global Perspective on the Past. 4th ed. Boston: McGraw-Hill, 2009.
Lua MLA (9ú heag.)Bentley, Jerry H., agus Herbert F. Ziegler. Traditions and Encounters: A Global Perspective on the Past. 4th ed. McGraw-Hill, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.