APA (7th ed.) Citation

Aptheker, H. (1948). To be free: Studies in American Negro history. International Publishers.

Chicago Style (17th ed.) Citation

Aptheker, Herbert. To Be Free: Studies in American Negro History. New York: International Publishers, 1948.

MLA (9th ed.) Citation

Aptheker, Herbert. To Be Free: Studies in American Negro History. International Publishers, 1948.