APA (7th ed.) Citation

Rasmussen, R. K., & Twain, M. (2013). Dear Mark Twain: Letters from his readers. University of California Press.

Chicago Style (17th ed.) Citation

Rasmussen, R. Kent, and Mark Twain. Dear Mark Twain: Letters from His Readers. Berkeley: University of California Press, 2013.

MLA (9th ed.) Citation

Rasmussen, R. Kent, and Mark Twain. Dear Mark Twain: Letters from His Readers. University of California Press, 2013.