Jennifer Tapke, Alyson Muller, Greg Johnson, Josh Sieck, House of Quality Steps in Understanding the House of Quality IE 361. Iowa State University. onlineArhivat în , la Wayback Machine.
Jennifer Tapke, Alyson Muller, Greg Johnson, Josh Sieck, House of Quality Steps in Understanding the House of Quality IE 361. Iowa State University. onlineArhivat în , la Wayback Machine.