Garcetti, Eric; Watts, Mark (2021-04-16). "C40 Annual Report 2020"(PDF). C40 Cities Climate Leadership Group. Archived(PDF) from the original on 2021-05-15. Retrieved 2023-09-02.
Garcetti, Eric; Watts, Mark (2021-04-16). "C40 Annual Report 2020"(PDF). C40 Cities Climate Leadership Group. Archived(PDF) from the original on 2021-05-15. Retrieved 2023-09-02.