APA (7th ed.) Citation

Walker, A. (2020). Model of operation-and-maintenance costs for photovoltaic systems. National Renewable Energy Laboratory.

Chicago Style (17th ed.) Citation

Walker, Andy. Model of Operation-and-maintenance Costs for Photovoltaic Systems. Golden, CO: National Renewable Energy Laboratory, 2020.

MLA (9th ed.) Citation

Walker, Andy. Model of Operation-and-maintenance Costs for Photovoltaic Systems. National Renewable Energy Laboratory, 2020.