APA
Birdsall S. S. F. J., . (1992). Outline of American geography : regional landscapes of the United States. San Francisco: United States Department of State.
Chicago
Birdsall Stephen S Florin John, . 1992. Outline of American geography : regional landscapes of the United States. San Francisco: United States Department of State.
Harvard
Birdsall S. S. F. J., . (1992). Outline of American geography : regional landscapes of the United States. San Francisco: United States Department of State.
MLA
Birdsall Stephen S Florin John, . Outline of American geography : regional landscapes of the United States. San Francisco: United States Department of State. 1992.