P.Beer Ferdinand, & Johnston, J. E. R. (1987). Mechanics for Engineers: Statics (photocopy). America: McGraw-Hill Science.
Trích dẫn kiểu ChicagoP.Beer Ferdinand, và Jr E. Russell Johnston. Mechanics for Engineers: Statics (photocopy). America: McGraw-Hill Science, 1987.
MLA引文P.Beer Ferdinand, và Jr E. Russell Johnston. Mechanics for Engineers: Statics (photocopy). America: McGraw-Hill Science, 1987.
警告:这些引文格式不一定是100%准确.