APA (7th ed.) Citation

Freud, S. (1949). Three essays on the theory of sexuality. Imago Pub. Co.

Chicago Style (17th ed.) Citation

Freud, S. Three Essays on the Theory of Sexuality. London: Imago Pub. Co, 1949.

MLA (9th ed.) Citation

Freud, S. Three Essays on the Theory of Sexuality. Imago Pub. Co, 1949.

Warning: These citations may not always be 100% accurate.