Clarke, G. (1991). Walt Whitman: The poem as private history. Vision.
Citazione stile Chigago Style (17a edizione)Clarke, Graham. Walt Whitman: The Poem as Private History. London: Vision, 1991.
Citatione MLA (9a ed.)Clarke, Graham. Walt Whitman: The Poem as Private History. Vision, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.