Gaya APA
Birdsall, S, S., Florin, J.
(1992).
Garis besar geografi Amerika
(
Ed. 4)
.
[s.l]:
John Wiley & Sons.
Gaya MLA
Birdsall, Stephen, S.., Florin, John.
"Garis besar geografi Amerika".
Ed. 4
[s.l]:
John Wiley & Sons,
1992.
Text.