Spruill, M. (2011). Decisions at Gettysburg: The nineteen critical decisions that defined the campaign. University of Tennessee Press.
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Lua i Stíl Chicago (17ú heag.)
Spruill, Matt. Decisions at Gettysburg: The Nineteen Critical Decisions That Defined the Campaign. Knoxville: University of Tennessee Press, 2011.
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Lua MLA (9ú heag.)
Spruill, Matt. Decisions at Gettysburg: The Nineteen Critical Decisions That Defined the Campaign. University of Tennessee Press, 2011.
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