Yang, jing shi chang diao yan ji chu yu shi xun/ [book] yang, jing - Beijing : ji xie gong ye, 2011. - 364 p. - gao zhi gao zhuan“shi er wu”gui hua jiao cai shi chang ying xiao xi lie . ISBN: 9787111339168 7111339169 Subjects--Topical Terms: Marketing research LC Class. No.: HF5415.2 / .Y22