APA-referens (7:e uppl.)

GOPAL M. (2008). CONTROL SYSTEMS: PRINCIPLES AND DESIGN 3RD ED (3RD ED.). TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED.

Chicago-referens (17:e uppl.)

GOPAL M. CONTROL SYSTEMS: PRINCIPLES AND DESIGN 3RD ED. 3RD ED. NEW DELHI: TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 2008.

MLA-referens (9:e uppl.)

GOPAL M. CONTROL SYSTEMS: PRINCIPLES AND DESIGN 3RD ED. 3RD ED. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 2008.