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Cisco Systems. (August 12, 2020). Cisco Systems' revenue worldwide from 2006 to 2020 (in billion U.S. dollars) [Graph]. In Statista. Retrieved June 23, 2021, from https://www.statista.com/statistics/271853/worldwide-net-sales-of-cisco-systems-since-2006/
Cisco Systems. "Cisco Systems' revenue worldwide from 2006 to 2020 (in billion U.S. dollars)." Chart. August 12, 2020. Statista. Accessed June 23, 2021. https://www.statista.com/statistics/271853/worldwide-net-sales-of-cisco-systems-since-2006/
Cisco Systems. (2020). Cisco Systems' revenue worldwide from 2006 to 2020 (in billion U.S. dollars). Statista. Statista Inc.. Accessed: June 23, 2021. https://www.statista.com/statistics/271853/worldwide-net-sales-of-cisco-systems-since-2006/
Cisco Systems. "Cisco Systems' Revenue Worldwide from 2006 to 2020 (in Billion U.S. Dollars)." Statista, Statista Inc., 12 Aug 2020, https://www.statista.com/statistics/271853/worldwide-net-sales-of-cisco-systems-since-2006/
Cisco Systems, Cisco Systems' revenue worldwide from 2006 to 2020 (in billion U.S. dollars) Statista, https://www.statista.com/statistics/271853/worldwide-net-sales-of-cisco-systems-since-2006/ (last visited June 23, 2021)
