APA Style
Economics. (1990).
California:
Addison-Wesley Publishing.
Chicago Style
Economics.
.
California:
Addison-Wesley Publishing,
1990.
Text.
MLA Style
Economics.
.
California:
Addison-Wesley Publishing,
1990.
Text.
Turabian Style
Economics.
California:
Addison-Wesley Publishing,
1990.
Print.