ISBN 0-521-26173-2. Steffens, H.J. James Prescott Joule and the Concept of Energy. Watson. 1979. ISBN 0-88202-170-2. Walker, James. Physics 4th Edition. Pearson
(原始内容存档于2023-08-20). 含有連結內容需訂閱查看的頁面 (link) Wolfgang Saxon. Josef Fried, 87, Organic Chemist Noted for Tailored Compounds. The New York Times. 1 September 2001: C 15