Gaya APA

AMERICA, D, O, I, P. (1981). Outline of the US. economy / Office International Information Program of American (ed.1). : US. Depatement of State.

Gaya MLA

AMERICA, Departent, Office, Information, Program. "Outline of the US. economy / Office International Information Program of American". ed.1 : US. Depatement of State, 1981. Referensi.