[en] We have searched for evidence of supersymmetry with the Collider Detector at Fermilab using trilepton events in p anti p collisions at √s = 1.8 TeV. In the Minimal Supersymmetric Standard Model (MSSM), we expect trilepton events from chargino-neutralino (ξ^±₁ξ⁰₂) pair production, with subsequent decay into leptons. In all possible combinations of electron and muon channels, we observe no candidate events in 107 pb^-1 of data. We present limits on chargino and neutralino production within the framework of a supergravity inspired MSSM: σ_ξ^±1ξ⁰2 · BR(ξ^±₁ξ⁰₂ → 3l + X) < 0.34 pb and M_ξ^±1 > 81.5 GeV/c² for tan β = 2, μ = -600 GeV/c² and M_q = M_g. We also present limits on a SU(5) x U(1) supergravity model and a 4 and 1/2 parameter Minimal SUGRA model