APA-Zitierstil (7. Ausg.)

Carr, M. S. (1950). The District of Columbia, its rocks and their geologic history. U.S. G.P.O.

Chicago-Zitierstil (17. Ausg.)

Carr, Martha S. The District of Columbia, Its Rocks and Their Geologic History. Washington [D.C.]: U.S. G.P.O, 1950.

MLA-Zitierstil (9. Ausg.)

Carr, Martha S. The District of Columbia, Its Rocks and Their Geologic History. U.S. G.P.O, 1950.