Cita APA (7th ed.)

Esswein, H., & Esswein, H. Moderne Illustratoren. Piper Verlag.

Cita Chicago (17th ed.)

Esswein, Hermann, i Hermann Esswein. Moderne Illustratoren. München; Leipzig: Piper Verlag.

Cita MLA (8th ed.)

Esswein, Hermann, i Hermann Esswein. Moderne Illustratoren. Piper Verlag.