Gaya APA

Lafeber, W. et al (1986). The American century : a history of the United States 1890-1947 (3rd ed). New York: Alfred A. Knopf.

Gaya MLA

Lafeber, Walter. et al. "The American century : a history of the United States 1890-1947". 3rd ed New York: Alfred A. Knopf, 1986. Text.