Helwig, T. (2020). Cross-racial class protest in antebellum American literature. University of Massachusetts Press.
芝加哥风格引文Helwig, Timothy. Cross-racial Class Protest in Antebellum American Literature. Amherst: University of Massachusetts Press, 2020.
MLA引文Helwig, Timothy. Cross-racial Class Protest in Antebellum American Literature. University of Massachusetts Press, 2020.
警告：这些引文格式不一定是100％准确.