Cita APA (7th ed.)

Humboldt, A. v., & Beck, H. (1992). Cuba-Werk. Wiss. Buchges..

Cita Chicago (17th ed.)

Humboldt, Alexander von, i Hanno Beck. Cuba-Werk. Darmstadt: Wiss. Buchges., 1992.

Cita MLA (8th ed.)

Humboldt, Alexander von, i Hanno Beck. Cuba-Werk. Wiss. Buchges., 1992.