APA引文
Hawking, S. W., & Penrose, R. (2010). The nature of space and time (13th print.). Princeton University Press.
Chicago Style (17th ed.) Citation
Hawking, S. W., and Roger Penrose. The Nature of Space and Time. 13th print. Princeton, N.J.: Princeton University Press, 2010.
MLA引文
Hawking, S. W., and Roger Penrose. The Nature of Space and Time. 13th print. Princeton University Press, 2010.
警告：這些引文格式不一定是100％准確.