Gaya APA

Paterson, T, G. et al (1991). American Foreign Policy: A History-Since 1900 (Third Ed. Revised). Toronto,Canada: D.C. Heath and Company.

Gaya MLA

Paterson, Thomas, G.. et al. "American Foreign Policy: A History-Since 1900". Third Ed. Revised Toronto,Canada: D.C. Heath and Company, 1991. Text.