Usher , A. P. (1929). A history of mechanical inventions. McGraw-Hill.
Chicago Style (17th ed.) CitationUsher , Abbott Payson. A History of Mechanical Inventions. New York: McGraw-Hill, 1929.
ציטוט MLAUsher , Abbott Payson. A History of Mechanical Inventions. McGraw-Hill, 1929.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.