Veevers-Carter, W., author
Oxford University Press , 1984
Buku Teks
Whitmore, T.C., author
Clarendon Press, 1990
Buku Teks
edited by Mark Collins ; foreword by David Attenborough
Oxford University Press, 1990
Buku Teks
Jacobs, Marius, author
Springer-Verlag, 1981
Buku Teks
edited by Helmut Lieth, M.J.A. Werger and David W. Goodall
Elsevier, 1992
Buku Teks