I just want to have a referance of literature review of customer satisfaction of toyota. Please share it

Since its founding, Toyota has carried out corporate activities based on the concept of "the customer always comes first." This concept was declared in "The Toyoda Precepts" (established in 1935) which has been handed down as the Toyota Group's guiding philosophy. Toyota, including its dealers, makes a company-wide effort to build relations with its customers, and all employees keep the "customer first" policy in mind in all aspects of their jobs.