Cita APA (7th ed.)

Cohen, D., Jeavons, P., & Živný, S. (2008). The expressive power of valued constraints: Hierarchies and collapses. Elsevier.

Cita Chicago (17th ed.)

Cohen, D., P. Jeavons, i S. Živný. The Expressive Power of Valued Constraints: Hierarchies and Collapses. Elsevier, 2008.

Cita MLA (9th ed.)

Cohen, D., et al. The Expressive Power of Valued Constraints: Hierarchies and Collapses. Elsevier, 2008.