later years of Metropolitan Steam. D. Bradford Barton. 1977. ISBN 0-85153-327-2. Day, John R.; Reed, John. The Story of London's Underground 10th. Capital
(原始内容存档于2022-07-15). Reed, David W. Smothered Meat With Rice and Gravy. Texas A&M University. [2012-11-24]. (原始内容存档于2013-01-24). Barton, Eric. How to Throw