International Correspondence Schools. The Elements of mechanical and electrical engineering: Prepared for students of the International Correspondence Schools, Scranton, Pa. . (First edition.). Methuen, Milton Keynes, Open University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)International Correspondence Schools. The Elements of Mechanical and Electrical Engineering: Prepared for Students of the International Correspondence Schools, Scranton, Pa. . First edition. London: Methuen, Milton Keynes, Open University Press.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)International Correspondence Schools. The Elements of Mechanical and Electrical Engineering: Prepared for Students of the International Correspondence Schools, Scranton, Pa. . First edition. Methuen, Milton Keynes, Open University Press.