Allen, T. B., & Abell, S. (1992). The Blue and the Gray. [Washington, D.C.]: National Geographic Society.
Chicago Style CitationAllen, Thomas B., and Sam Abell. The Blue and the Gray. [Washington, D.C.]: National Geographic Society, 1992.
MLA CitationAllen, Thomas B., and Sam Abell. The Blue and the Gray. [Washington, D.C.]: National Geographic Society, 1992.
Warning: These citations may not always be 100% accurate.