APA Style
      Duff, Jon M.. (1991).
    CADKEY Light: Computer Aided Design and Drafting for Engineers and Technologists .
    Englewood Cliffs:
  Prentice Hall.
  
Chicago Style
      Duff, Jon M..
    CADKEY Light: Computer Aided Design and Drafting for Engineers and Technologists.
    
    Englewood Cliffs:
  Prentice Hall,
  1991.
  Text.
  
MLA Style
      Duff, Jon M..
    CADKEY Light: Computer Aided Design and Drafting for Engineers and Technologists.
    
    Englewood Cliffs:
  Prentice Hall,
  1991.
  Text.
  
Turabian Style
      Duff, Jon M..
    CADKEY Light: Computer Aided Design and Drafting for Engineers and Technologists.
     
    Englewood Cliffs:
  Prentice Hall,
  1991.
  Print.