APA ציטוט
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.
ציטוט MLA
Hawking, S. W., and Roger Penrose. The Nature of Space and Time. 13th print. Princeton University Press, 2010.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.