The Formula omitted-particle light response of liquid scintillators based on linear alkylbenzene (LAB) has been measured with three different experimental approaches. In the first approach, Formula omitted-particles were produced in the scintillator via Formula omittedC(n, Formula omitted) Formula omittedBe reactions. In the second approach, the scintillator was loaded with 2 % of Formula omittedSm providing an Formula omitted-emitter, Formula omittedSm, as an internal source. In the third approach, a scintillator flask was deployed into the water-filled SNO+ detector and the radioactive contaminants Formula omittedRn, Formula omittedPo and Formula omittedPo provided the Formula omitted-particle signal. The behavior of the observed Formula omitted-particle light outputs are in agreement with each case successfully described by Birks' law. The resulting Birks parameter kB ranges from Formula omitted to Formula omitted cm/MeV. In the first approach, the Formula omitted-particle light response was measured simultaneously with the light response of recoil protons produced via neutron-proton elastic scattering. This enabled a first time a direct comparison of kB describing the proton and the Formula omitted-particle response of LAB based scintillator. The observed kB values describing the two light response functions deviate by more than Formula omitted. The presented results are valuable for all current and future detectors, using LAB based scintillator as target, since they depend on an accurate knowledge of the scintillator response to different particles.