Cita APA (7th ed.)
Bibus, E., & Semmel, A. (1972). Geomorphologie arider Gebiete: Geomorphology of arid areas. Borntraeger.
Cita Chicago (17th ed.)
Bibus, Erhard, i Arno Semmel. Geomorphologie Arider Gebiete: Geomorphology of Arid Areas. Berlin, Stuttgart: Borntraeger, 1972.
Cita MLA (9th ed.)
Bibus, Erhard, i Arno Semmel. Geomorphologie Arider Gebiete: Geomorphology of Arid Areas. Borntraeger, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.