Cita APA (7th ed.)

Scabell, G., & Vogeler, M. (2020). Martha Vogeler: Gudrun Scabell. Kellner Verlag.

Cita Chicago (17th ed.)

Scabell, Gudrun, i Martha Vogeler. Martha Vogeler: Gudrun Scabell. Bremen: Kellner Verlag, 2020.

Cita MLA (8th ed.)

Scabell, Gudrun, i Martha Vogeler. Martha Vogeler: Gudrun Scabell. Kellner Verlag, 2020.