APA (7th ed.) Citation

Stein, E., & Stein, W. (1964). On the problem of empathy. M. Nijhoff.

Chicago Style (17th ed.) Citation

Stein, Edith, and Waltraut Stein. On the Problem of Empathy. The Hague: M. Nijhoff, 1964.

MLA (9th ed.) Citation

Stein, Edith, and Waltraut Stein. On the Problem of Empathy. M. Nijhoff, 1964.