6DeAngelo L. E. Audit Size and Audit Quality[J]. Journal of Accounting and Economics, 1981 (3) :183-199.
7Watts,R. ,J. Zimmerrnan. Agency Problems, Auditing and the Theory of the Firm:Some Evidence[J]. Journal of Law and Economics,1983(26):613-633.
8Alvin A. Arens, Randal J. Elder, Mark S. Beasley. Auditing and Assurance Services: An Integrated Approach (10^th)[M]. Upper Saddle River:Prentice Hall,2005.