Business rules are statements that express (certain parts of) a business policy, defining business terms and defining or constraining the operations of an enterprise, in a declarative manner. Since these rules define and constrain the interaction among business agents in the course of business processes, they have to refer to the components of their mental state, such as the knowledge/information and the commitments of an organization. We propose an agent-oriented approach to business rules and show how to represent and visualize business rules and business processes in Agent-Object-Relationship modeling.