Gaya APA
Boyce, Ronald Reed. (1982).
Geographic perspective on global problems : an introduction to geography .
Singapore:
John Wiley.
Gaya Chicago
Boyce, Ronald Reed.
Geographic perspective on global problems : an introduction to geography.
Singapore:
John Wiley,
1982.
Text.
Gaya MLA
Boyce, Ronald Reed.
Geographic perspective on global problems : an introduction to geography.
Singapore:
John Wiley,
1982.
Text.
Gaya Turabian
Boyce, Ronald Reed.
Geographic perspective on global problems : an introduction to geography.
Singapore:
John Wiley,
1982.
Print.