APA Style
Principles of economics. (1972).
:
THE MCMILLAN.
Chicago Style
Principles of economics.
1.
:
THE MCMILLAN,
1972.
TXB.
MLA Style
Principles of economics.
1.
:
THE MCMILLAN,
1972.
TXB.
Turabian Style
Principles of economics.
:
THE MCMILLAN,
1972.
TXB.