Cita APA (7th ed.)

Oelmann, U., & Groppe, C. (2020). Stefan George - Ernst Morwitz: Briefwechsel (1905-1933). De Gruyter.

Cita Chicago (17th ed.)

Oelmann, Ute, i Carola Groppe. Stefan George - Ernst Morwitz: Briefwechsel (1905-1933). Berlin/Boston: De Gruyter, 2020.

Cita MLA (8th ed.)

Oelmann, Ute, i Carola Groppe. Stefan George - Ernst Morwitz: Briefwechsel (1905-1933). De Gruyter, 2020.