O’Brien, D. (2020). A small Iowa farmer's perspective on COVID-19. Agric Human Values.
Citação norma ChicagoO’Brien, Denise. "A Small Iowa Farmer's Perspective On COVID-19." Agric Human Values 2020.
MLA引文O’Brien, Denise. "A Small Iowa Farmer's Perspective On COVID-19." Agric Human Values 2020.
警告:這些引文格式不一定是100%准確.