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Cisco Systems. (May 19, 2021). Cisco Systems' total operating expenses from 2019 to 2021, by quarter (in billion U.S. dollars) [Graph]. In Statista. Retrieved June 13, 2021, from https://www.statista.com/statistics/1099485/cisco-systems-total-operating-expenses-by-quarter/
Cisco Systems. "Cisco Systems' total operating expenses from 2019 to 2021, by quarter (in billion U.S. dollars)." Chart. May 19, 2021. Statista. Accessed June 13, 2021. https://www.statista.com/statistics/1099485/cisco-systems-total-operating-expenses-by-quarter/
Cisco Systems. (2021). Cisco Systems' total operating expenses from 2019 to 2021, by quarter (in billion U.S. dollars). Statista. Statista Inc.. Accessed: June 13, 2021. https://www.statista.com/statistics/1099485/cisco-systems-total-operating-expenses-by-quarter/
Cisco Systems. "Cisco Systems' Total Operating Expenses from 2019 to 2021, by Quarter (in Billion U.S. Dollars)." Statista, Statista Inc., 19 May 2021, https://www.statista.com/statistics/1099485/cisco-systems-total-operating-expenses-by-quarter/
Cisco Systems, Cisco Systems' total operating expenses from 2019 to 2021, by quarter (in billion U.S. dollars) Statista, https://www.statista.com/statistics/1099485/cisco-systems-total-operating-expenses-by-quarter/ (last visited June 13, 2021)
