Gaya APA
Frank, Robert H.. (2013).
Principles of Economics .
New York:
McGraw-Hill.
Gaya Chicago
Frank, Robert H..
Principles of Economics.
New York:
McGraw-Hill,
2013.
Text.
Gaya MLA
Frank, Robert H..
Principles of Economics.
New York:
McGraw-Hill,
2013.
Text.
Gaya Turabian
Frank, Robert H..
Principles of Economics.
New York:
McGraw-Hill,
2013.
Print.