APA Style
Economics. (1991).
Homewood:
Richard D.Irwin.
Chicago Style
Economics.
2nd ed.
Homewood:
Richard D.Irwin,
1991.
Text.
MLA Style
Economics.
2nd ed.
Homewood:
Richard D.Irwin,
1991.
Text.
Turabian Style
Economics.
Homewood:
Richard D.Irwin,
1991.
Print.