APA Style
Frank, Robert H. (2007).
Principles of economics .
:
.
Chicago Style
Frank, Robert H.
Principles of economics.
:
,
2007.
Text.
MLA Style
Frank, Robert H.
Principles of economics.
:
,
2007.
Text.
Turabian Style
Frank, Robert H.
Principles of economics.
:
,
2007.
Print.