Cita APA (7th ed.)

Perry, C. A., Aldridge, B. N., & Ross, H. C. (2001). Summary of significant floods in the United States, Puerto Rico, and the Virgin Islands, 1970 through 1989. U.S. G.P.O. For sale by the USGS Map Distribution.

Cita Chicago (17th ed.)

Perry, Charles A., B. N. Aldridge, i H. C. Ross. Summary of Significant Floods in the United States, Puerto Rico, and the Virgin Islands, 1970 Through 1989. Washington, Denver, CO: U.S. G.P.O. For sale by the USGS Map Distribution, 2001.

Cita MLA (9th ed.)

Perry, Charles A., et al. Summary of Significant Floods in the United States, Puerto Rico, and the Virgin Islands, 1970 Through 1989. U.S. G.P.O. For sale by the USGS Map Distribution, 2001.