Jeffrey Meyers (1996). Robert Frost: a biography. Houghton Mifflin. ISBN9780395856031. „Frost remained at Harvard until March of his sophomore year, when he decamped in the middle of a term ...”
Nancy Lewis Tuten; John Zubizarreta (2001). The Robert Frost encyclopedia. Greenwood Publishing Group. стр. 145. ISBN978-0-313-29464-8. „Halfway through the spring semester of his second year, Dean Briggs released him from Harvard without prejudice, lamenting the loss of so good a student.”