APA (7th ed.) Citation

Freud, S., Abraham, K., & Freud, S. (2009). 1915 - 1925. Turia & Kant.

Chicago Style (17th ed.) Citation

Freud, Sigmund, Karl Abraham, and Sigmund Freud. 1915 - 1925. Wien: Turia & Kant, 2009.

MLA (8th ed.) Citation

Freud, Sigmund, et al. 1915 - 1925. Turia & Kant, 2009.