Abdullah, F. (2026) “COMPARATIVE ANALYSIS OF P, PI, AND PID CONTROLLERS BASED ON THE ZIEGLER-NICHOLS ULTIMATE GAIN METHOD FOR A TWO-DEGREE-OF- FREEDOM SUSPENSION SYSTEM”, Barometer. Karawang, Indonesia, 11(3), pp. 85–93. doi: 10.35261/barometer.v11i3.13237.