Huppertz, J. (1956). Geister am Roroima. Röth.
Cita Chicago (17th ed.)Huppertz, Josefine. Geister Am Roroima. Eisenach: Röth, 1956.
Cita MLA (8th ed.)Huppertz, Josefine. Geister Am Roroima. Röth, 1956.
Atenció: Aquestes cites poden no estar 100% correctes.