Cita APA (7a ed.)

Keller, H. A., & Bülte, L. (1909). Anhang zu The story of my life. Velhagen & Klasing.

Cita Chicago Style (17a ed.)

Keller, Helen Adams, y Luise Bülte. Anhang Zu The Story of My Life. Bielefeld ; Leipzig: Velhagen & Klasing, 1909.

Cita MLA (9a ed.)

Keller, Helen Adams, y Luise Bülte. Anhang Zu The Story of My Life. Velhagen & Klasing, 1909.