Gaya APA

Birdsall, S, S., Mahidin, . (1992). Garis Besar Geografi Amerika (-). -: John Wiley and Sons Inc..

Gaya MLA

Birdsall, Stephen, S.., Mahidin, . "Garis Besar Geografi Amerika". - -: John Wiley and Sons Inc., 1992. Text.