APA (7th ed.) Citation

Maass, J. R. (2015). The Petersburg and Appomattox camp[a]igns, 1864-1865. Center of Military History, United States Army.

Chicago Style (17th ed.) Citation

Maass, John R. The Petersburg and Appomattox Camp[a]igns, 1864-1865. Washington, D.C.: Center of Military History, United States Army, 2015.

MLA (9th ed.) Citation

Maass, John R. The Petersburg and Appomattox Camp[a]igns, 1864-1865. Center of Military History, United States Army, 2015.