Gaya APA
Guell, Robert C.. (2010).
Issues in economics today (15th ed.).
New York:
McGraw-Hill.
Gaya Chicago
Guell, Robert C..
Issues in economics today.
15th ed.
New York:
McGraw-Hill,
2010.
Text.
Gaya MLA
Guell, Robert C..
Issues in economics today.
15th ed.
New York:
McGraw-Hill,
2010.
Text.
Gaya Turabian
Guell, Robert C..
Issues in economics today.
15th ed.
New York:
McGraw-Hill,
2010.
Print.