APA (7th ed.) Citation

Persico, J. E. (1977). My enemy, my brother: Men and days of Gettysburg. Viking Press.

Chicago Style (17th ed.) Citation

Persico, Joseph E. My Enemy, My Brother: Men and Days of Gettysburg. New York: Viking Press, 1977.

MLA (9th ed.) Citation

Persico, Joseph E. My Enemy, My Brother: Men and Days of Gettysburg. Viking Press, 1977.