(en) « On August 20, 1986, a part-time letter carrier named Patrick H. Sherrill, facing possible dismissal after a troubled work history », The Journal of Employee Assistance, (lire en ligne, consulté le )
(en) « Death Toll in Calif. Postal Shooting Rises: Calif. Sheriff's Deputies Say Woman Accused in Post Office Killings May Have Also Shot Her Former Neighbor », ABC News, (lire en ligne [archive du ]).
(en) Robert Hanley, « 4 Slain in 2 New Jersey Attacks And Former Postal Clerk Is Held », The New York Times, (lire en ligne)
(en) John Holusha et Randal C. Archibold, « Ex-Employee Kills 6 Others and Herself at California Postal Plant », The New York Times, (lire en ligne, consulté le )
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(en)Doron P. Levin, « Ex-Postal Worker Kills 3 and Wounds 6 in Michigan », The New York Times, (lire en ligne, consulté le )
(en) « Death Toll in Calif. Postal Shooting Rises: Calif. Sheriff's Deputies Say Woman Accused in Post Office Killings May Have Also Shot Her Former Neighbor », ABC News, (lire en ligne [archive du ]).