Macfadyen, A.
Pitman Publishing Corporation, 1963
Buku Teks
Pandey, B.N.
Tata McGraw-Hill, 2012
Buku Teks
Louw, Gideon N.
Longman Scientific and Technical, 1993
Buku Teks
Kendeigh, S. Charles
Prentice-Hall, 1975
Buku Teks
Lythgoe, J.N.
Oxford University Press, 1979
Buku Teks