APA-referens (7:e uppl.)

GUPTA, S. (2002). ELEMENTS OF CONTROL SYSTEMS. PHI.

Chicago-referens (17:e uppl.)

GUPTA, SUDHIR. ELEMENTS OF CONTROL SYSTEMS. NEW DELHI: PHI, 2002.

MLA-referens (9:e uppl.)

GUPTA, SUDHIR. ELEMENTS OF CONTROL SYSTEMS. PHI, 2002.