APA (7th ed.) Citation

Eysenck, H. J. (1990). Differential psychology before and after William Stern. Psychologische Beiträge, 32(3/4), 249-262.

Chicago Style (17th ed.) Citation

Eysenck, Hans Jürgen. "Differential Psychology Before and After William Stern." Psychologische Beiträge 32, no. 3/4 (1990): 249-262.

MLA (9th ed.) Citation

Eysenck, Hans Jürgen. "Differential Psychology Before and After William Stern." Psychologische Beiträge, vol. 32, no. 3/4, 1990, pp. 249-262.