Costain, T. B. (1960). The Chord of Steel: Alexander Graham Bell and the invention of the telephone. New York: Doubleday and Company.
استشهاد بنمط شيكاغوCostain, Thomas B. The Chord of Steel: Alexander Graham Bell and the Invention of the Telephone. New York: Doubleday and Company, 1960.
MLA استشهادCostain, Thomas B. The Chord of Steel: Alexander Graham Bell and the Invention of the Telephone. New York: Doubleday and Company, 1960.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.