APA Style
      Balmer, Leslie. (1990).
    SIGNALS AND SYSTEMS AN INTRODUCTION .
    New York:
  Prentice Hall.
  
Chicago Style
      Balmer, Leslie.
    SIGNALS AND SYSTEMS AN INTRODUCTION.
    
    New York:
  Prentice Hall,
  1990.
  Text.
  
MLA Style
      Balmer, Leslie.
    SIGNALS AND SYSTEMS AN INTRODUCTION.
    
    New York:
  Prentice Hall,
  1990.
  Text.
  
Turabian Style
      Balmer, Leslie.
    SIGNALS AND SYSTEMS AN INTRODUCTION.
     
    New York:
  Prentice Hall,
  1990.
  Print.