Gaya APA
Parkin, Michael. (2008).
Economics (8th.ed.).
Boston:
Pearson.
Gaya Chicago
Parkin, Michael.
Economics.
8th.ed.
Boston:
Pearson,
2008.
Text.
Gaya MLA
Parkin, Michael.
Economics.
8th.ed.
Boston:
Pearson,
2008.
Text.
Gaya Turabian
Parkin, Michael.
Economics.
8th.ed.
Boston:
Pearson,
2008.
Print.