6HOLLIS E V., Toward improving Ph.D. programs [R].Washington D.C. :American Council on Education, 1945:86, 96.
7SHULMAN L S . Reclaiming education's doctorates :a critique and a proposal [J]. Educational Researcher, 2006, 35 (3): 25-32.
8HOFFER T B, WELCH V Jr, WEBBER K, et al. Doctorate recipients from United States universities: summary report 2005[R]. Chicago :National Opinion Research Center, 2006: 6-9.
9BOURNER T, BOWDEN R, LAING S. Professional doctorates in England [J].Studies in Higher Education, 2001, 26 (1) : 65-83.
10GREEN B, MAXWELL T, SHANAHAN P. Doctoral education and professional practice:the next generation? [M]. Armidale, Australia: Kardoorair Press, 2001:23.