Richard Vangermeersch. "Control: Classic modelԱրխիվացված 2015-02-09 Wayback Machine," in: History of Accounting: An International Encyclopedia. Michael Chatfield, Richard Vangermeersch eds. 1996/2014. p. 174-75.
Michael Chatfield. "Whitmore, JohnԱրխիվացված 2015-01-16 Wayback Machine," in: History of Accounting: An International Encyclopedia. Michael Chatfield, Richard Vangermeersch eds. 1996/2014. p. 607-8.
Michael Chatfield. "Harrison, G. Charter 1881-Արխիվացված 2016-03-04 Wayback Machine," in: Michael Chatfield, Richard Vangermeersch (eds.), The History of Accounting (RLE Accounting): An International Encyclopedia 2014. p. 291.
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Richard Vangermeersch. "Control: Classic modelԱրխիվացված 2015-02-09 Wayback Machine," in: History of Accounting: An International Encyclopedia. Michael Chatfield, Richard Vangermeersch eds. 1996/2014. p. 174-75.
Michael Chatfield. "Whitmore, JohnԱրխիվացված 2015-01-16 Wayback Machine," in: History of Accounting: An International Encyclopedia. Michael Chatfield, Richard Vangermeersch eds. 1996/2014. p. 607-8.
Michael Chatfield. "Harrison, G. Charter 1881-Արխիվացված 2016-03-04 Wayback Machine," in: Michael Chatfield, Richard Vangermeersch (eds.), The History of Accounting (RLE Accounting): An International Encyclopedia 2014. p. 291.