Cita APA

Oliveros, O., & Vallejo, G. (2008). The XXI century guidance and its social responsibility. Web

Citación estilo Chicago

Oliveros, Olga, and Grisel Vallejo. The XXI Century Guidance and Its Social Responsibility. 2008.

Cita MLA

Oliveros, Olga, and Grisel Vallejo. The XXI Century Guidance and Its Social Responsibility. 2008.