APA (7th ed.) Citation

Inter Nationes, Meyer, A., & Hentschel, C. (1969). Alejandro de Humboldt, 1769/1969. Inter Nationes.

Chicago Style (17th ed.) Citation

Inter Nationes, Adolf Meyer, and Cedric Hentschel. Alejandro De Humboldt, 1769/1969. Bad Godesberg: Inter Nationes, 1969.

MLA (9th ed.) Citation

Inter Nationes, et al. Alejandro De Humboldt, 1769/1969. Inter Nationes, 1969.