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iResearch. (November 17, 2020). Market size of digital oral language examination technologies in China from 2017 to 2019 with a forecast until 2022 (in billion yuan) [Graph]. In Statista. Retrieved July 24, 2021, from https://www.statista.com/statistics/1211811/china-market-size-of-oral-language-examination-technology/
iResearch. "Market size of digital oral language examination technologies in China from 2017 to 2019 with a forecast until 2022 (in billion yuan)." Chart. November 17, 2020. Statista. Accessed July 24, 2021. https://www.statista.com/statistics/1211811/china-market-size-of-oral-language-examination-technology/
iResearch. (2020). Market size of digital oral language examination technologies in China from 2017 to 2019 with a forecast until 2022 (in billion yuan). Statista. Statista Inc.. Accessed: July 24, 2021. https://www.statista.com/statistics/1211811/china-market-size-of-oral-language-examination-technology/
iResearch. "Market Size of Digital Oral Language Examination Technologies in China from 2017 to 2019 with a Forecast until 2022 (in Billion Yuan)." Statista, Statista Inc., 17 Nov 2020, https://www.statista.com/statistics/1211811/china-market-size-of-oral-language-examination-technology/
iResearch, Market size of digital oral language examination technologies in China from 2017 to 2019 with a forecast until 2022 (in billion yuan) Statista, https://www.statista.com/statistics/1211811/china-market-size-of-oral-language-examination-technology/ (last visited July 24, 2021)
