Gaya APA
Case, Karl E, Fair, Ray C, Oster, Sharon M. (2013).
Principles of economics (10th Ed.).
England:
Pearson Education International.
Gaya Chicago
Case, Karl E, Fair, Ray C, Oster, Sharon M.
Principles of economics.
10th Ed.
England:
Pearson Education International,
2013.
Text.
Gaya MLA
Case, Karl E, Fair, Ray C, Oster, Sharon M.
Principles of economics.
10th Ed.
England:
Pearson Education International,
2013.
Text.
Gaya Turabian
Case, Karl E, Fair, Ray C, Oster, Sharon M.
Principles of economics.
10th Ed.
England:
Pearson Education International,
2013.
Print.