Gaya APA
Fogiel, M.. (1980).
The Economics problem solver .
America:
Research and Education Association.
Gaya Chicago
Fogiel, M..
The Economics problem solver.
America:
Research and Education Association,
1980.
Text.
Gaya MLA
Fogiel, M..
The Economics problem solver.
America:
Research and Education Association,
1980.
Text.
Gaya Turabian
Fogiel, M..
The Economics problem solver.
America:
Research and Education Association,
1980.
Print.