Gaya APA
Birdsall, Stephen S.. (1994).
Garis besar geografi Amerika .
Jakarta:
United States Department of State.
Gaya Chicago
Birdsall, Stephen S..
Garis besar geografi Amerika.
Jakarta:
United States Department of State,
1994.
Buku Non-ketenaganukliran.
Gaya MLA
Birdsall, Stephen S..
Garis besar geografi Amerika.
Jakarta:
United States Department of State,
1994.
Buku Non-ketenaganukliran.
Gaya Turabian
Birdsall, Stephen S..
Garis besar geografi Amerika.
Jakarta:
United States Department of State,
1994.
Buku Non-ketenaganukliran.