The hidden rules of successful negotiation and communication, 2014: title page (Marc O. Opresnik) title page verso (Marc O. Opresnik, Luebeck University of Applied Sciences, Luebeck, Germany) page 133 (Dr. Marc Oliver Opresnik studied business economics from 1989 to 1996 at the University of Hamburg specializing in Marketing, Human Resource Management and Business English. SInce January 2013 Dr. Opresnik is a professor of marketing and a member of the Board of Directors at SGMI management Institute St. Gallen.)

OCLC database viewed December 4, 2014 (heading: Opresnik, Marc Oliver, 1969-; usage: Marc O. Opresnik, Marc Opresnik, Marc Oliver Opresnik)