APA (7th ed.) Citation

American Council of Learned Societies devoted to Humanistic Studies, Johnson, A., & Malone, D. (1928). Dictionary of American biography. Scribner's Sons.

Chicago Style (17th ed.) Citation

American Council of Learned Societies devoted to Humanistic Studies, Allen Johnson, and Dumas Malone. Dictionary of American Biography. New York: Scribner's Sons, 1928.

MLA (9th ed.) Citation

American Council of Learned Societies devoted to Humanistic Studies, et al. Dictionary of American Biography. Scribner's Sons, 1928.