APA Style
Introduction to economics. (1991).
Boston:
Richard D.Irwin.
Chicago Style
Introduction to economics.
2nd ed.
Boston:
Richard D.Irwin,
1991.
Text.
MLA Style
Introduction to economics.
2nd ed.
Boston:
Richard D.Irwin,
1991.
Text.
Turabian Style
Introduction to economics.
Boston:
Richard D.Irwin,
1991.
Print.