APA (7th ed.) Citation

(1930). The letters of Sacco and Vanzetti. Vanguard Press.

Chicago Style (17th ed.) Citation

The Letters of Sacco and Vanzetti. Vanguard Press, 1930.

MLA (8th ed.) Citation

The Letters of Sacco and Vanzetti. Vanguard Press, 1930.

Warning: These citations may not always be 100% accurate.