ジョセフ・レイバック
↑ Rayback, Joseph G. (1966-01-01) [1959], A History of American Labor, The Free Press, MacMillon, pp. 504, ISBN 978-0029258507
↑ “News of Phi Alpha Theta”. The Historian 26 (4): 604–609. (August 1964). http://onlinelibrary.wiley.com/doi/10.1111/j.1540-6563.1964.tb00269.x/abstract?systemMessage=Wiley+Online+Library+will+be+disrupted+2nd+Apr+from+10-12+BST+for+monthly+maintenance.