Gaya APA

Florin, S, S, B, &, J. (). Garis Besar Geografi Amerika (Ed..1, Jlh EKSP=2). : United States Departement Of State Office Of English Language Programs.

Gaya MLA

Florin, Stephen, S., Birdsall, &, John. "Garis Besar Geografi Amerika". Ed..1, Jlh EKSP=2 : United States Departement Of State Office Of English Language Programs, . Text.