Gaya APA
Samuelson, Paul A.. (2005).
Economics .
Boston:
McGraw hill.
Gaya Chicago
Samuelson, Paul A..
Economics.
Boston:
McGraw hill,
2005.
Text.
Gaya MLA
Samuelson, Paul A..
Economics.
Boston:
McGraw hill,
2005.
Text.
Gaya Turabian
Samuelson, Paul A..
Economics.
Boston:
McGraw hill,
2005.
Print.