Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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