Present. Oxford University Press. 2006: 70–72. ISBN 978-0195137569. DonE. Fehrenbacher and Ward M. Mcafee; The Slaveholding Republic: An Account of the
April 23, 1858 [2021-01-28]. (原始内容存档于2020-02-20) –通过newspapers.com. Fehrenbacher, DonE. The Origins and Purpose of Lincoln's 'House-Divided' Speech. Mississippi
Lamy of Santa Fe 1977 戴维·M·波特(由唐·E.费伦巴赫尔(英语:DonE. Fehrenbacher)编辑完善) David M. Potter (edited by DonE. Fehrenbacher) 《危机将至:内战前的美国,1848-1861(英语:The Impending