Gray, Richard, 1944-
American poetry of the twentieth century
Longman, 1991
 Buku Teks
Dembo, L.S.
Conceptions of reality in modern American poetry
University of California Press, 1966
 Buku Teks
Stepanchev, Stephen
American poetry since 1945 : a critical survey
Harper and Row, 1965
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Poets on poetry / edited, Howard Nemerov
Basic Books, Inc., 1966
 Buku Teks
Forrest-Thomson, Veronica
Poetic artifice : a theory of twentieth-century poetry
Manchester University Press, 1978
 Buku Teks