APA
U.S. Department of the Interior, Switzer J. C. & Porcella R. L. (1990). Catalogue of U.S. Geological Survey strong-motion records, 1988. Denver: U.S. Geological Survey.
Chicago
U.S. Department of the Interior, Switzer Josephine C and Porcella Ronald L. 1990. Catalogue of U.S. Geological Survey strong-motion records, 1988. Denver: U.S. Geological Survey.
Harvard
U.S. Department of the Interior, Switzer J. C. and Porcella R. L. (1990). Catalogue of U.S. Geological Survey strong-motion records, 1988. Denver: U.S. Geological Survey.
MLA
U.S. Department of the Interior, Switzer Josephine C and Porcella Ronald L. Catalogue of U.S. Geological Survey strong-motion records, 1988. Denver: U.S. Geological Survey. 1990.