Gaya APA
NORTH, D.
(1961).
The Economic growth of the United States 1790-1860
.
England Cliffs:
N.J. Prentice-Hall.
Gaya MLA
NORTH, Douglass.
"The Economic growth of the United States 1790-1860".
England Cliffs:
N.J. Prentice-Hall,
1961.
Buku.