APA (7th ed.) Citation

Grimsley, M., & Simpson, B. D. (1999). Gettysburg: A battlefield guide. Univ. of Nnebraska Press.

Chicago Style (17th ed.) Citation

Grimsley, Mark, and Brooks D. Simpson. Gettysburg: A Battlefield Guide. Lincoln [u.a.]: Univ. of Nnebraska Press, 1999.

MLA (9th ed.) Citation

Grimsley, Mark, and Brooks D. Simpson. Gettysburg: A Battlefield Guide. Univ. of Nnebraska Press, 1999.