Richard P Feynman. (1992). The character of physical law. London: Penguin Books.
Trích dẫn kiểu ChicagoRichard P Feynman. The Character of Physical Law. London: Penguin Books, 1992.
ציטוט MLARichard P Feynman. The Character of Physical Law. London: Penguin Books, 1992.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.