Butler, Judith
Routledge, 1999
Buku Teks
Butler, James N.
Addison-Wesley, 1982
Buku Teks
Butler, B. Robert
The Idaho State University Museum, 1968
Buku Teks
selected and edited, with an essay by Herbert J. C. Grierson
Greenwood Press, 1958
Buku Teks
Butler, David
Futura Publications, 1982
Buku Teks