APA Style
Peterson, Willis L. (1974).
Principles of economics... .
:
.
Chicago Style
Peterson, Willis L.
Principles of economics....
:
,
1974.
.
MLA Style
Peterson, Willis L.
Principles of economics....
:
,
1974.
.
Turabian Style
Peterson, Willis L.
Principles of economics....
:
,
1974.
.