APA (7th ed.) Citation

Rieder, H., Kohl, M., & Ruckdeschel, P. (2001). The costs of not knowing the radius. Humboldt-Univ.

Chicago Style (17th ed.) Citation

Rieder, Helmut, Matthias Kohl, and Peter Ruckdeschel. The Costs of Not Knowing the Radius. Berlin: Humboldt-Univ, 2001.

MLA (9th ed.) Citation

Rieder, Helmut, et al. The Costs of Not Knowing the Radius. Humboldt-Univ, 2001.