Graham, P. (2012). The present: Paul Graham (First edition.). Mack.
Chicago-Zitierstil (17. Ausg.)Graham, Paul. The Present: Paul Graham. First edition. [London]: Mack, 2012.
MLA-Zitierstil (8. Ausg.)Graham, Paul. The Present: Paul Graham. First edition. Mack, 2012.
警告:这些引文格式不一定是100%准确.