<BIRDSALL, S. S. Garis besar geografi Amerka. John Willey & Sons.
Chicago Style (17th ed.) Citation<BIRDSALL, Stephen S.>. Garis Besar Geografi Amerka. John Willey & Sons.
MLA (8th ed.) Citation<BIRDSALL, Stephen S.>. Garis Besar Geografi Amerka. John Willey & Sons.
Warning: These citations may not always be 100% accurate.