MLA
Clapp, Henry S. Sketches of Army Life in the Sixties and "The Mansion by the Spring" : a Civil War Story of the Shenandoah. [Mary Belle Clapp Cline and Katharine B. Clapp Horton], 1910. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/491fj6q7qq-cor.
APA, 6th edition
Clapp, H. S. (1910). Sketches of army life in the sixties and "The mansion by the spring" : a Civil War story of the Shenandoah [African American publisher., African American author., Regimental histories.]. [Mary Belle Clapp Cline and Katharine B. Clapp Horton]; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/491fj6q7qq-cor.
Chicago
Clapp, Henry S. “Sketches of Army Life in the Sixties and ‘The Mansion by the Spring’ : a Civil War Story of the Shenandoah.” African American publisher., African American author., Regimental histories. African American Imprints Collection. [Newark, Ohio]: [Mary Belle Clapp Cline and Katharine B. Clapp Horton], 1910. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/491fj6q7qq-cor.