APA (7th ed.) Citation

Heaton, T. H. (1989). National Seismic System science plan. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Heaton, Thomas H. National Seismic System Science Plan. [Reston, Virginia]: U.S. Department of the Interior, U.S. Geological Survey, 1989.

MLA (9th ed.) Citation

Heaton, Thomas H. National Seismic System Science Plan. U.S. Department of the Interior, U.S. Geological Survey, 1989.