APA

Brown R. D., Ward P. L. & Plafker G. (1973). Geologic and seismologic aspects of the Managua, Nicaragua, earthquakes of December 23, 1972. Washington, D.C: U.S. Gov. Print. Off.

Chicago

Brown Robert David, Ward P L and Plafker George. 1973. Geologic and seismologic aspects of the Managua, Nicaragua, earthquakes of December 23, 1972. Washington, D.C: U.S. Gov. Print. Off.

Harvard

Brown R. D., Ward P. L. and Plafker G. (1973). Geologic and seismologic aspects of the Managua, Nicaragua, earthquakes of December 23, 1972. Washington, D.C: U.S. Gov. Print. Off.

MLA

Brown Robert David, Ward P L and Plafker George. Geologic and seismologic aspects of the Managua, Nicaragua, earthquakes of December 23, 1972. Washington, D.C: U.S. Gov. Print. Off. 1973.