Abrams, M. H., A Glossary of Literary Terms, Sixth edition, Harcourt Brace, 1993, p. 108.

Drake, William, "Introduction," in Mirror of the Heart: Poems of Sara Teasdale, edited by William Drake, Macmillan, 1984, pp. xxxviii-xxxxix.

Teasdale, Sara, Flame and Shadow, The Macmillan Company, 1935.

Untermeyer, Louis, in Bookman, Vol. LII, No. 5, January 1921, pp. 361-64.

—, The New Era in American Poetry, H. Holt, 1919, p. 267.

Van Doren, Mark, in Nation, Vol. 112, No. 2896, January 5, 1921, p. 20.