APA Style
Principles of economics. (1979).
London:
The Macmillan Press Ltd..
Chicago Style
Principles of economics.
.
London:
The Macmillan Press Ltd.,
1979.
Text.
MLA Style
Principles of economics.
.
London:
The Macmillan Press Ltd.,
1979.
Text.
Turabian Style
Principles of economics.
London:
The Macmillan Press Ltd.,
1979.
Print.