Jacobs, Marius, author
Springer-Verlag, 1981
Buku Teks
Whitmore, T.C., author
Clarendon Press, 1990
Buku Teks
Whitmore, T.C., author
Oxford University Press, 1986
Buku Teks
edited by Helmut Lieth, M.J.A. Werger and David W. Goodall
Elsevier, 1992
Buku Teks
edited by F.B. Golley
Elsiver, 1983
Buku Referensi