Gaya APA
Birdsall, Stephen S, Gembirasari. (1992).
Garis besar geografi Amerika .
United States of America:
John Wiley and Sons, Inc.
Gaya Chicago
Birdsall, Stephen S, Gembirasari.
Garis besar geografi Amerika.
United States of America:
John Wiley and Sons, Inc,
1992.
Text.
Gaya MLA
Birdsall, Stephen S, Gembirasari.
Garis besar geografi Amerika.
United States of America:
John Wiley and Sons, Inc,
1992.
Text.
Gaya Turabian
Birdsall, Stephen S, Gembirasari.
Garis besar geografi Amerika.
United States of America:
John Wiley and Sons, Inc,
1992.
Print.