APA-ийн эшлэл(7 дахь хэвлэлт)

Fenchel, W., Nielsen, J., & Schmidt, A. L. (2003). Discontinuous groups of isometries in the hyperbolic plane. Walter de Gruyter.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Fenchel, W., Jakob Nielsen, ба Asmus L. Schmidt. Discontinuous Groups of Isometries in the Hyperbolic Plane. Berlin ; New York: Walter de Gruyter, 2003.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Fenchel, W., et al. Discontinuous Groups of Isometries in the Hyperbolic Plane. Walter de Gruyter, 2003.