Gaya APA
CASE, Karl E.. (2013).
Principles of economics .
New York:
Pearson Education.
Gaya Chicago
CASE, Karl E..
Principles of economics.
New York:
Pearson Education,
2013.
Text.
Gaya MLA
CASE, Karl E..
Principles of economics.
New York:
Pearson Education,
2013.
Text.
Gaya Turabian
CASE, Karl E..
Principles of economics.
New York:
Pearson Education,
2013.
Print.