Gaya APA
Case, Karl E.. (410).
Principles of Economics .
Singapore:
Pearson Education.
Gaya Chicago
Case, Karl E..
Principles of Economics.
Singapore:
Pearson Education,
410.
Text.
Gaya MLA
Case, Karl E..
Principles of Economics.
Singapore:
Pearson Education,
410.
Text.
Gaya Turabian
Case, Karl E..
Principles of Economics.
Singapore:
Pearson Education,
410.
Print.