Wigglesworth, V.B.
The life of insects
Worth, 1964
 Buku Teks
Smith, Nick Charlton
Guide to the management of CDM co-ordination
[RIBA , ], 2007
 eBooks
Beer, Samuel H.
Treasury control : the co-ordination of financial and economic policy in Great Britain
Clarendon Press, 1957
 Buku Teks
Strategic review of library co-ordination and representation Robert Gardini
 Artikel Jurnal
Starr, Cecie
Evolution of life : biology
Thomson, 2004
 Buku Teks