Penggayaan APA
GUELL, Robert C.. (2010).
Issues in economics today (5th ed.).
New York:
McGraw Hill.
Chicago Style
GUELL, Robert C..
Issues in economics today.
5th ed.
New York:
McGraw Hill,
2010.
Buku.
MLA Style
GUELL, Robert C..
Issues in economics today.
5th ed.
New York:
McGraw Hill,
2010.
Buku.
Turabian Style
GUELL, Robert C..
Issues in economics today.
5th ed.
New York:
McGraw Hill,
2010.
Buku.