Cita APA (7th ed.)

Ball, H., & Schütt-Hennings, A. (1957). Briefe: 1911-1927. Benziger.

Cita Chicago (17th ed.)

Ball, Hugo, i Annemarie Schütt-Hennings. Briefe: 1911-1927. Einsiedeln [u.a.]: Benziger, 1957.

Cita MLA (8th ed.)

Ball, Hugo, i Annemarie Schütt-Hennings. Briefe: 1911-1927. Benziger, 1957.