Stearns, P. N. (1987). World History: Patterns of change and continuity. Harper & Row.
Lua i Stíl Chicago (17ú heag.)Stearns, Peter N. World History: Patterns of Change and Continuity. New York: Harper & Row, 1987.
Lua MLA (9ú heag.)Stearns, Peter N. World History: Patterns of Change and Continuity. Harper & Row, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.