APA (7th ed.) Citation

Sacco, N., Frankfurter, M. D., & Vanzetti, B. (1928). The letters of Sacco and Vanzetti. Viking Press.

Chicago Style (17th ed.) Citation

Sacco, Nicola, Marion Denman Frankfurter, and Bartolomeo Vanzetti. The Letters of Sacco and Vanzetti. N.Y.: Viking Press, 1928.

MLA (8th ed.) Citation

Sacco, Nicola, et al. The Letters of Sacco and Vanzetti. Viking Press, 1928.