Carr, E. H. (1987). What is history? (2nd ed.). Knopf ; Penguin Books.
芝加哥风格引文Carr, Edward Hallett. What Is History? 2nd ed. New York ; Harmondsworth, Middlesex: Knopf ; Penguin Books, 1987.
MLA引文Carr, Edward Hallett. What Is History? 2nd ed. Knopf ; Penguin Books, 1987.
警告：这些引文格式不一定是100％准确.