Cita APA (7th ed.)

Jansen, C. (1991). Emil Julius Gumbel: Portrait eines Zivilisten. Wunderhorn.

Cita Chicago (17th ed.)

Jansen, Christian. Emil Julius Gumbel: Portrait Eines Zivilisten. Heidelberg: Wunderhorn, 1991.

Cita MLA (8th ed.)

Jansen, Christian. Emil Julius Gumbel: Portrait Eines Zivilisten. Wunderhorn, 1991.