Gaya APA

Phillips, C, L., Harbor, R, D. (1991). Feedback control systems / Charles L. Phillips, Royce D. Harbor (Ed.ke-2). London: Prentice - Hall International, Inc..

Gaya MLA

Phillips, Charles, L.., Harbor, Royce, D.. "Feedback control systems / Charles L. Phillips, Royce D. Harbor". Ed.ke-2 London: Prentice - Hall International, Inc., 1991. Textbook.