APA-referens (7:e uppl.)
Costello, B. (2003). Shifting ground: Reinventing landscape in modern American poetry. Harvard University Press.
Chicago-referens (17:e uppl.)
Costello, Bonnie. Shifting Ground: Reinventing Landscape in Modern American Poetry. Cambridge: Harvard University Press, 2003.
MLA-referens (9:e uppl.)
Costello, Bonnie. Shifting Ground: Reinventing Landscape in Modern American Poetry. Harvard University Press, 2003.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.