中国科学技术信息研究所--国家工程技术数字图书馆

walden university.(46)

capella university.(25)

northcentral university.(20)

university of california los angeles.(13)

grand canyon university.(9)

university of southern california.(9)

walden university(9)

arizona state university.(8)

northeastern university.(8)

columbia university.(6)

liberty university.(6)

the university of north carolina at chapel hill.(6)

the university of wisconsin - madison.(6)

university of minnesota.(6)

wilmington university (delaware).(6)

azusa pacific university.(5)

harvard university.(5)

syracuse university.(5)

the pennsylvania state university.(5)

boston college.(4)

capella university(4)

greensboro college.(4)

michigan state university.(4)

seton hall university.(4)

state university of new york at albany.(4)

the chicago school of professional psychology.(4)

the university of north carolina at greensboro.(4)

university of california berkeley.(4)

university of california santa barbara.(4)

university of la verne.(4)