Cita APA (7a ed.)

Nachtigal, G., Fisher, A. G. B., Fisher, H. J., & O'Fahey, R. S. (1971). Sahara and Sudan (Translated from the original German. reprint 2019.). University of California Press.

Cita Chicago Style (17a ed.)

Nachtigal, Gustav, Allan G. B. Fisher, Humphrey J. Fisher, y Rex S. O'Fahey. Sahara and Sudan. Translated from the original German. reprint 2019. Berkeley, CA: University of California Press, 1971.

Cita MLA (8a ed.)

Nachtigal, Gustav, et al. Sahara and Sudan. Translated from the original German. reprint 2019. University of California Press, 1971.