Gaya APA
Harrod, R., Swanson, C, P. (1959).
**International economics .
Digswell Place:
Digswell Place: James Nisbet & Co; 1959.
Gaya MLA
Harrod, R.F., Swanson, Carl, P..
"**International economics".
Digswell Place:
Digswell Place: James Nisbet & Co; 1959,
1959.
Text.