Beale, E. M., & Wallbank, T. W. (1982). Workbook for Living world history, 5th ed., T. Walter Wallbank, Arnold Schrier. Scott, Foresman.
Lua i Stíl Chicago (17ú heag.)Beale, Elizabeth M., agus T. Walter Wallbank. Workbook for Living World History, 5th Ed., T. Walter Wallbank, Arnold Schrier. Glenview, Ill.: Scott, Foresman, 1982.
Lua MLA (8ú heag.)Beale, Elizabeth M., agus T. Walter Wallbank. Workbook for Living World History, 5th Ed., T. Walter Wallbank, Arnold Schrier. Scott, Foresman, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.