Poets of the English language
edited by, W.H. Auden and Norman Holmes Pearson
Eyre & Spottiswoode, 1952
 Buku Teks SO
Contemporary authors bibliographical series; Volume 2, American poets
edited by Ronald Baughman
Gale Reserach , 1986
 Buku Referensi
Twelve American poets
edited by Stephen Whicher and Lars Ahnebrink
Oxford University Press, 1961
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Conner, Fredeick William
Cosmic optimism : a study of the interpretation of evolution by American poets from Emerson to Robinson
University of Florida Press, 1949
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The new pocket anthology of American verse, from colonial days to the present
edited by Oscar Williams
Washingtonn Press, 1955
 Buku Teks SO