http://www.ehow.com/how_109041_hire-housecleaner.html
http://www.modernmom.com/article/maid-to-last-tips-for-hiring-home-cleaning-help-from-the-pros
http://forums.thathomesite.com/forums/load/cleaning/msg0523354512973.html?19
http://www.servicemagic.com/article.show.Domestic-Cleaning-Services.14992.html