APA (7th ed.) Citation

Ebbinghaus, H., Ruger, H. A., Bussenius, C. E., & Hilgard, E. R. (1987). Memory: A contribution to experimental psychology. Dover Publications.

Chicago Style (17th ed.) Citation

Ebbinghaus, Hermann, Henry A. Ruger, Clara E. Bussenius, and Ernest R. Hilgard. Memory: A Contribution to Experimental Psychology. New York: Dover Publications, 1987.

MLA (8th ed.) Citation

Ebbinghaus, Hermann, et al. Memory: A Contribution to Experimental Psychology. Dover Publications, 1987.