Penggayaan APA
GUELL, Robert C. (2012).
Issues in economics today (6th. ed.).
New York:
McGraw Hill.
Chicago Style
GUELL, Robert C.
Issues in economics today.
6th. ed.
New York:
McGraw Hill,
2012.
Buku.
MLA Style
GUELL, Robert C.
Issues in economics today.
6th. ed.
New York:
McGraw Hill,
2012.
Buku.
Turabian Style
GUELL, Robert C.
Issues in economics today.
6th. ed.
New York:
McGraw Hill,
2012.
Buku.