Gaya APA

LaFeber, W., Richard, I, P. (1992). The American century a history of the united states since 1941 . New: Mc Graw Hill Education.

Gaya MLA

LaFeber, Walter., Richard, I., Polenberg,. "The American century a history of the united states since 1941". New: Mc Graw Hill Education, 1992. Text.