Cassirer, E. (1923). Substance and function and einstein's theory of relativity. New York: Dover Publication, INC.
استشهاد بنمط شيكاغوCassirer, Ernst. Substance and Function and Einstein's Theory of Relativity. New York: Dover Publication, INC, 1923.
MLA استشهادCassirer, Ernst. Substance and Function and Einstein's Theory of Relativity. New York: Dover Publication, INC, 1923.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.