APA

Stover C. W., Coffman J. L., . (1993). Seismicity of the United States, 1568-1989 (revised). Washington: U.S. G.P.O.

Chicago

Stover Carl W, Coffman Jerry L, . 1993. Seismicity of the United States, 1568-1989 (revised). Washington: U.S. G.P.O.

Harvard

Stover C. W., Coffman J. L., . (1993). Seismicity of the United States, 1568-1989 (revised). Washington: U.S. G.P.O.

MLA

Stover Carl W, Coffman Jerry L, . Seismicity of the United States, 1568-1989 (revised). Washington: U.S. G.P.O. 1993.