3Frost, Robert. Mending Wall[J]. Noxth of Boston . New York. 1915. Great Books Online. bartleby.com, 1999. 19 Aug. 2006. < http://www.bartleby.com/118/2.html>.
4Holland, N. Norman. The 'Unconsciousness' of Literature: Psychoanalytical Approach [J]. Contemporary Criticism. London: Edward Arnold Publishers Ltd., 1963.
5Robert Lee Frost [EB/OL].Online posting. 1 Apr. 2006. Literature.20 Aug. 2006. <http://www.yybest.com/Educlass/gnks/ zkyy/200604/4040.html>.
6Wu, Weiren. ed. History and Anthology of American Literature [M]. vols. 2. Beijing: Foreign Language Teaching and Research Press, 1998.
7Zhao Zhengqing.General English Rhetoric[]..1996
8Attridge D.The Rhyme of English Poetry[]..1982
9Robert Frost."A Prayer in Spring."[].Collected Poems Prose& Plays.1995