Gaya APA
Davidson, ., Gienapp, . (2002).
Nation of Nations : A Concise Narrative of American Republic (3 rd ed.).
united state:
McGraw-Hill.
Gaya MLA
Davidson, ., Gienapp, .
"Nation of Nations : A Concise Narrative of American Republic".
3 rd ed.
united state:
McGraw-Hill,
2002.
Text.