APA Style

Birdsall, S, S., Florin, J. (1992). Outline of American Geography : Regional landscapes of the United States / Stephen S. Birdsall and John Florin (4). New Jersey: John Wiley & Sons.

MLA Style

Birdsall, Stephen, S.., Florin, John. "Outline of American Geography : Regional landscapes of the United States / Stephen S. Birdsall and John Florin". 4 New Jersey: John Wiley & Sons, 1992. Textbook ห้องสมุดทั่วไป.