Little, A. W. Selwyn
The United States Armed Forces Institute, 1941
Buku Teks
Daugherty, Carrol R.
Houghton Mifflin, 1952
Buku Teks
Quint, Howard H
Dorsey Press, 1968
Buku Teks
Springer-Verlag, 1969
Buku Teks SO
edited by R.W. Lewis
Pineridge Press, 1979
Buku Teks SO