APA Style
Gregory , G . R.. ().
Forest Resource Economics .
:
John Wiley & Sons, Inc. New York.
Chicago Style
Gregory , G . R..
Forest Resource Economics.
:
John Wiley & Sons, Inc. New York,
.
Text.
MLA Style
Gregory , G . R..
Forest Resource Economics.
:
John Wiley & Sons, Inc. New York,
.
Text.
Turabian Style
Gregory , G . R..
Forest Resource Economics.
:
John Wiley & Sons, Inc. New York,
.
Print.