APA

Lucas R. W., . (2005). Customer service: building successful skills for the twenty-first century. Boston: Mc Graw Hill.

Chicago

Lucas Robert W, . 2005. Customer service: building successful skills for the twenty-first century. Boston: Mc Graw Hill.

Harvard

Lucas R. W., . (2005). Customer service: building successful skills for the twenty-first century. Boston: Mc Graw Hill.

MLA

Lucas Robert W, . Customer service: building successful skills for the twenty-first century. Boston: Mc Graw Hill. 2005.