compiled and edited by Harold Shepherd and Byron D. Sher
Foundation Press, 1960
Buku Teks
Sullivan, John L.
McGraw-Hill, 1977
Buku Teks
Walker, Samuel
McGraw-Hill, 1992
Buku Teks
Sawer, Geoffrey, 1910-1996
Clarendon Press, 1965
Buku Teks
Schur, Edwin M.
Random House, 1968
Buku Teks