Faculty of Law, Universitas Airlangga

Graduate Assistant, University of Nebraska

Paul J. Evanson Professor of Law, Columbia University

University of Northern Colorado

Assoc. Professor - STMIK Dharmapala Riau

Curtin University

Professor of Business Law & Ethics, Prairie View A&M University

Professor of Business Law & Ethics, University of Texas at Austin

Professor Emeritus of Business Law, University of Genoa, Law Department

Universiti Putra Malaysia