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.