Auden, W. H. (1969). City without walls: And other poems. Random House.
芝加哥风格引文Auden, W. H. City Without Walls: And Other Poems. New York: Random House, 1969.
MLA引文Auden, W. H. City Without Walls: And Other Poems. Random House, 1969.
警告：这些引文格式不一定是100％准确.