edited by Max F. Millikan
Yale University Press, 1953
Buku Teks
Lioi, Vittorio Corbo
North Holland , 1974
Buku Teks
Darby, Michael R.
McGraw-Hill, 1976
Buku Teks
Aboyade, Ojetunji, author
Addison-Wesley, 1983
Buku Teks
edited by William R. Cline and Sidney Weintraub
Washington, D.C. , Brooklins Institution
Buku Teks