Joseph Conrad. (2019). Heart of Darkness (Penguin Essentials). Penguin Classics.
芝加哥风格引文Joseph Conrad. Heart of Darkness (Penguin Essentials). Penguin Classics, 2019.
MLA引文Joseph Conrad. Heart of Darkness (Penguin Essentials). Penguin Classics, 2019.
警告：这些引文格式不一定是100％准确.