Gaya APA

Swanson, C, P., Merk, F. (1968). **The monroe doctrine and american expansionism 1843-1849 . New York: New York: Alfred A. Knopf; 1968.

Gaya MLA

Swanson, Carl, P.., Merk, Frederick. "**The monroe doctrine and american expansionism 1843-1849". New York: New York: Alfred A. Knopf; 1968, 1968. Text.