Gaya APA

Birdsall, S, S., Florin, J. (1992). Garis Besar Geografi Amerika (4). New Jersey: John Wiley & Sons .

Gaya MLA

Birdsall, Stephen, S., Florin, John. "Garis Besar Geografi Amerika". 4 New Jersey: John Wiley & Sons , 1992. Reference.