Krebs, J.R.
Blackwell Scientific , 1988
Buku Teks
edited by J.R. Krebs and N.B. Davies
Blackwell, 1995
Buku Teks
edited by Bernard Stonehouse and Christopher M. Perrins
University Park Press, 1979
Buku Teks
Ridley, Mark
Blackwell, 1995
Buku Teks
Macfadyen, A.
Pitman Publishing Corporation, 1963
Buku Teks