4Raymond J. Corsini, Encyclopedia of Psychology[M]. New York: Wiler & Sons. Inc, 1984.
5Chickering. A. W. ,Reisse K. The Seven Vectors. In:K.Anorld and I. C. King (Eds.) ,College Student Development and Academic Life : psychological, Intellectual, Social and Moral Issues[M]. New York:Garland Publishing, 1997.
