Dictionary of Livestock Breeds, Types and Varieties. West Sussex: CABI(英语:CABI (organisation)). March 2002: 122 [2017-01-03]. ISBN 085199430X. (原始内容存档于2017-12-23)
Genetics, Breeding and Biotechnology edited by W. M. Muir, S. E. Aggrey - CABI, Sep 4, 2003 - page 5 The World Egg Industry - a few facts and figures (页面存档备份,存于互联网档案馆)
Ship Tourism. CABI. 2006: 3. ISBN 1-84593-049-5. Cater, Carl; Cater, Erlet. Marine Ecotourism: Between the Devil and the Deep Blue Sea. CABI. 2007: 8. ISBN 1-84593-260-9