APA (7th ed.) Citation

Freud, S. (1996). The major works of Sigmund Freud (2nd ed., 6th pr.). Encyclopedia Britannica.

Chicago Style (17th ed.) Citation

Freud, Sigmund. The Major Works of Sigmund Freud. 2nd ed., 6th pr. Chicago [etc.]: Encyclopedia Britannica, 1996.

MLA (9th ed.) Citation

Freud, Sigmund. The Major Works of Sigmund Freud. 2nd ed., 6th pr. Encyclopedia Britannica, 1996.