MLA

Opresnik, Marc Oliver, and Marc O Opresnik. The Hidden Rules of Successful Negotiation and Communication. Springer International Publishing, 2014.

APA

Opresnik, M. Oliver, & Opresnik, M. O. (2014). The Hidden Rules of Successful Negotiation and Communication. Springer International Publishing.

Chicago

Opresnik, Marc Oliver, and Marc O Opresnik. The Hidden Rules of Successful Negotiation and Communication. : Springer International Publishing, 2014.