Gaya APA
Guell, Robert C.. (2011).
Issues in economics today (6th ed.).
New York:
McGraw-Hill.
Gaya Chicago
Guell, Robert C..
Issues in economics today.
6th ed.
New York:
McGraw-Hill,
2011.
Text.
Gaya MLA
Guell, Robert C..
Issues in economics today.
6th ed.
New York:
McGraw-Hill,
2011.
Text.
Gaya Turabian
Guell, Robert C..
Issues in economics today.
6th ed.
New York:
McGraw-Hill,
2011.
Print.