Gaya APA

Florin, J., Birdsall, S, S. ([s.a). Garis Besar Geografi Amerika ( ). Jakarta_: United States Department of State.

Gaya MLA

Florin, John., Birdsall, Stephen, S.. "Garis Besar Geografi Amerika". Jakarta_: United States Department of State, [s.a. Buku Teks.