Primary source material (by Standard Edition chronology):
Freud, Sigmund, (1891) On Aphasia 1891. London and New York, 1953.
Freud, Sigmund, (1893) On the Psychical Mechanism of Hysterical Phenomena. [with J. Breuer] SE 2, 3-17
Freud, Sigmund, (1894) The Neuro-Psychoses of Defence. SE 3, 43-61
Freud, Sigmund, (1895) A Project for a Scientific Psychology. SE 1, 283-397
Freud, Sigmund, (1895) Studies on Hysteria. [with J. Breuer]. SE 2
Freud, Sigmund, (1896) The Aetiology of Hysteria. SE 3, 189-221