Barry, John M. (2004). The Great Influenza: The Epic Story of the Greatest Plague in History. [S.l.]: Viking Penguin. ISBN0-670-89473-7 (This book covers a great deal of Welch's life as well as other medical people of the era.)
Donald Fleming (1954). William H. Welch and the Rise of Modern Medicine. The Johns Hopkins University Press. ISBN 0-8018-3389-2.