Lioi, Vittorio Corbo
North Holland , 1974
Buku Teks
Hansen, Bent, author
Rinehart, 1951
Buku Teks
Cumes, J.W.C., author
Pergamon Press Australia, 1974
Buku Teks
Thirlwall, A.P.
Macmillan, 1974
Buku Teks
edited by Max F. Millikan
Yale University Press, 1953
Buku Teks