Cita APA (7a ed.)

Lang, C. L. (2007). Fries - Gellert. De Gruyter.

Cita Chicago Style (17a ed.)

Lang, Carl Ludwig. Fries - Gellert. Berlin [u.a.]: De Gruyter, 2007.

Cita MLA (8a ed.)

Lang, Carl Ludwig. Fries - Gellert. De Gruyter, 2007.