Cita APA

Ebbinghaus, H., & Ewing, J. H. (1990). Numbers. Springer-Verlag.

Chicago Edition Citation

Ebbinghaus, Heinz-Dieter, i John H. Ewing. Numbers. New York: Springer-Verlag, 1990.

Cita MLA

Ebbinghaus, Heinz-Dieter, i John H. Ewing. Numbers. Springer-Verlag, 1990.