APA
Harding S. T., . (1973). Contributions to seismic zoning. Boulder, Colo: National Oceanic and Atmospheric Administration.
Chicago
Harding Samuel T, . 1973. Contributions to seismic zoning. Boulder, Colo: National Oceanic and Atmospheric Administration.
Harvard
Harding S. T., . (1973). Contributions to seismic zoning. Boulder, Colo: National Oceanic and Atmospheric Administration.
MLA
Harding Samuel T, . Contributions to seismic zoning. Boulder, Colo: National Oceanic and Atmospheric Administration. 1973.