Cita APA (7th ed.)

Schwarz, K. (1920). Lesser Ury.

Cita Chicago (17th ed.)

Schwarz, Karl. Lesser Ury. Berlin, 1920.

Cita MLA (8th ed.)

Schwarz, Karl. Lesser Ury. 1920.

Atenció: Aquestes cites poden no estar 100% correctes.