Wiley, E.O.
John Wiley & Sons, 1981
Buku Teks
Boughey, Arthur S.
Dickenson , 1967
Buku Teks
Scott-Ram, N.R.
Cambridge University Press, 1989
Buku Teks
Panchen, Alec L.
Cambridge University Press, 1994
Buku Teks
The Johns Hopkins University Press, 1993
Buku Teks