JAMES, P. E. (1980). One world divided - Preston E. James, Kempton Webb, Eileen W. James. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)JAMES, Preston E. One World Divided - Preston E. James, Kempton Webb, Eileen W. James. John Wiley & Sons, 1980.
Lua MLA (8ú heag.)JAMES, Preston E. One World Divided - Preston E. James, Kempton Webb, Eileen W. James. John Wiley & Sons, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.