A.R.Gillespie Ed, Gillespie, A. R., Porter, S. C., & Atwater, B. F. (2004). The Quaternary period in the United States. Elsevier.
Chicago Edition CitationA.R.Gillespie Ed, Alan R. Gillespie, Stephen C. Porter, and Brian F. Atwater. The Quaternary Period in the United States. Amsterdam [Netherlands] ; New York: Elsevier, 2004.
MLA Edition CitationA.R.Gillespie Ed, et al. The Quaternary Period in the United States. Elsevier, 2004.
Warning: These citations may not always be 100% accurate.