Cita APA (7a ed.)

Figueiredo, Y. (2012). “The Defining Issues of the Twenty-First Century.”.

Cita Chicago Style (17a ed.)

Figueiredo, Yves. “The Defining Issues of the Twenty-First Century.”. 2012.

Cita MLA (8a ed.)

Figueiredo, Yves. “The Defining Issues of the Twenty-First Century.”. 2012.