Cita APA (7th ed.)

Zieschang, H., Vogt, E., Coldewey, H., & Stillwell, J. Surfaces and planar discontinuous groups. Springer.

Cita Chicago (17th ed.)

Zieschang, Heiner, Elmar Vogt, Hans-Dieter Coldewey, i John Stillwell. Surfaces and Planar Discontinuous Groups. Berlin [etc.]: Springer.

Cita MLA (8th ed.)

Zieschang, Heiner, et al. Surfaces and Planar Discontinuous Groups. Springer.