Beers, B. F. (1991). World history: Patterns of civilization (Annotated teacher's ed., heritage ed.). Prentice Hall.
Cita Chicago Style (17a ed.)Beers, Burton F. World History: Patterns of Civilization. Annotated teacher's ed., heritage ed. Englewood Cliffs, N.J: Prentice Hall, 1991.
Cita MLA (9a ed.)Beers, Burton F. World History: Patterns of Civilization. Annotated teacher's ed., heritage ed. Prentice Hall, 1991.
Precaución: Estas citas no son 100% exactas.