References
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- Organization for Economic Co-operation and Development . 2005 . International road traffic and accident database , Paris : OECD . Retrieved April 2006, from www.irtad.net
- Transport Research Laboratory Overseas Centre . 1995 . Costing road accidents in developing countries (Overseas Road Note 10) , Crowthorne, , UK : Transport Research Laboratory .
- World Health Organization . 2004 . World report on road traffic injury prevention (summary) , Geneva : WHO .
- World Health Organization . 2006 . Mortality country (Yemen) fact sheet , Geneva : WHO .