Gaya APA
Field, Barry C.. (2001).
Natural Resource Economics .
Boston:
MCGRAW-HILL.
Gaya Chicago
Field, Barry C..
Natural Resource Economics.
Boston:
MCGRAW-HILL,
2001.
Teks.
Gaya MLA
Field, Barry C..
Natural Resource Economics.
Boston:
MCGRAW-HILL,
2001.
Teks.
Gaya Turabian
Field, Barry C..
Natural Resource Economics.
Boston:
MCGRAW-HILL,
2001.
Teks.