Mole, John, author
Sinclair-Stevenson, 1995
Buku Teks
Lerner, Laurence D., author
Secker & Warburg, 1984
Buku Teks
Shapcott, Thomas William, 1935-, author
University of Queensland, 1989
Buku Teks
Yeats, W.B., author
Everyman's Library, 1992
Buku Referensi
Conner, Fredeick William
University of Florida Press, 1949
Buku Teks