Macfadyen, A.
Pitman Publishing Corporation, 1963
Buku Teks
Lythgoe, J.N.
Oxford University Press, 1979
Buku Teks
Pandey, B.N.
Tata McGraw-Hill, 2012
Buku Teks
Krebs, J.R.
Blackwell Science, 1993
Buku Teks
edited by Ian R. Swingland and Paul J. Greenwood
Clarendon Press, 1983
Buku Teks