APA (7th ed.) Citation

O'Shaughnessy, E., & Burd, R. (2021). Status and trends in the voluntary market (2020 data). NREL.

Chicago Style (17th ed.) Citation

O'Shaughnessy, Eric, and Rebecca Burd. Status and Trends in the Voluntary Market (2020 Data). [Golden, Colo.]: NREL, 2021.

MLA (9th ed.) Citation

O'Shaughnessy, Eric, and Rebecca Burd. Status and Trends in the Voluntary Market (2020 Data). NREL, 2021.