Gaya APA
Parkin, Michael. (1997).
Economics (Ed. 4.).
USA:
Addinson-Wesley Publishing Company, Inc.
Gaya Chicago
Parkin, Michael.
Economics.
Ed. 4.
USA:
Addinson-Wesley Publishing Company, Inc,
1997.
.
Gaya MLA
Parkin, Michael.
Economics.
Ed. 4.
USA:
Addinson-Wesley Publishing Company, Inc,
1997.
.
Gaya Turabian
Parkin, Michael.
Economics.
Ed. 4.
USA:
Addinson-Wesley Publishing Company, Inc,
1997.
.