APA

Fortmann M., Paul T. V. & Wirtz J. J.Balance of power theory and practice in the 21st century. [Lugar desconocido]: [Editorial desconocida].

Chicago

Fortmann Michel, Paul T V and Wirtz James J.Balance of power theory and practice in the 21st century. [Lugar desconocido]: [Editorial desconocida].

Harvard

Fortmann M., Paul T. V. and Wirtz J. J.Balance of power theory and practice in the 21st century. [Lugar desconocido]: [Editorial desconocida].

MLA

Fortmann Michel, Paul T V and Wirtz James J.[Lugar desconocido]: [Editorial desconocida]. .