Cita APA (7th ed.)
Koehler, W., & Koffka, M. (1968). Werte und Tatsachen: (The Place of value in a world of facts [Deutsch]). Springer.
Cita Chicago (17th ed.)
Koehler, Wolfgang, i Mira Koffka. Werte Und Tatsachen: (The Place of Value in a World of Facts [Deutsch]). Heidelberg, New York: Springer, 1968.
Cita MLA (9th ed.)
Koehler, Wolfgang, i Mira Koffka. Werte Und Tatsachen: (The Place of Value in a World of Facts [Deutsch]). Springer, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.