Keeton, William T.
W.W. Norton, 1967
Buku Teks SO
Keeton, William T.
Penguin Books, 1976
Buku Teks SO
edited by Irving William Knobloch
Appleton-Century-Crofts, 1967
Buku Teks SO
edited by John Brady
Cambridge University Press, 1982
Buku Teks
Silverstein, Alvin
Rinehart Press , 1974
Buku Teks SO